diff --git a/QA.md b/QA.md
index 1c06861..a7a0c01 100644
--- a/QA.md
+++ b/QA.md
@@ -12,6 +12,9 @@ Test operations with default key maps.
 - [ ] <kbd>Ctrl</kbd>+<kbd>B</kbd>, <kbd>Ctrl</kbd>+<kbd>F</kbd>: scroll up and down by a screen
 - [ ] <kbd>0</kbd>, <kbd>$</kbd>: scroll to leftmost and rightmost
 - [ ] <kbd>g</kbd><kbd>g</kbd>, <kbd>G</kbd>: scroll to top and bottom
+- [ ] Smooth scroll by `:set smoothscroll`
+- [ ] Non-smooth scroll by `:set nosmoothscroll`
+- [ ] Configure custom hint character by settings `"smoothscroll": true`, `"smoothscroll": false`
 
 #### Console
 
@@ -24,7 +27,8 @@ The behaviors of the console are tested in [Console section](#consoles).
 
 #### Tabs
 
-- [ ] <kbd>d</kbd>: delete current tab
+- [ ] <kbd>d</kbd>: delete current tab, unable to remove pinnned tab
+- [ ] <kbd>!d</kbd>: delete current tab and pinned tab
 - [ ] <kbd>u</kbd>: reopen close tab
 - [ ] <kbd>K</kbd>, <kbd>J</kbd>: select prev and next tab
 - [ ] <kbd>g0</kbd>, <kbd>g$</kbd>: select first and last tab
@@ -32,6 +36,7 @@ The behaviors of the console are tested in [Console section](#consoles).
 - [ ] <kbd>R</kbd>: reload current tab without cache
 - [ ] <kbd>zd</kbd>: duplicate current tab
 - [ ] <kbd>zp</kbd>: toggle pin/unpin state on current tab
+- [ ] <kbd>Ctrl</kbd>+<kbd>6</kbd>: select previous selected tab
 
 #### Navigation
 
@@ -62,6 +67,8 @@ The behaviors of the console are tested in [Console section](#consoles).
 - [ ] Select link and open it in the frame in `<iframe>`/`<frame`> on following by <kbd>f</kbd>
 - [ ] Select link and open it in new tab in `<iframe>`/`<frame`> on following by <kbd>F</kbd>
 - [ ] Select link and open it in `<area>` tags, for <kbd>f</kbd> and <kbd>F</kbd>
+- [ ] Configure custom hint character by `:set hintchars=012345678`
+- [ ] Configure custom hint character by settings `"hintchars": "012345678"`
 
 ### Consoles
 
@@ -117,7 +124,7 @@ The behaviors of the console are tested in [Console section](#consoles).
 ##### Validations
 
 - [ ] show error on invalid json
-- [ ] show error when top-level keys has keys other than `keymaps`, `search`, and `blacklist`
+- [ ] show error when top-level keys has keys other than `keymaps`, `search`, `blacklist`, and `properties`
 
 ###### `"keymaps"` section
 
@@ -142,6 +149,11 @@ The behaviors of the console are tested in [Console section](#consoles).
 - [ ] keymap settings are applied to open tabs without reload
 - [ ] search settings are applied to open tabs without reload
 
+##### Properties
+
+- [ ] show errors when invalid property name
+- [ ] show errors when invalid property type
+
 #### Form Settings
 
 <!-- validation on form settings does not implement in 0.7 -->
diff --git a/README.md b/README.md
index 75b50a7..2421e59 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ The default mappings are as follows:
 
 #### Tabs
 - <kbd>d</kbd>: delete current tab
+- <kbd>!</kbd><kbd>d</kbd>: delete pinned tab
 - <kbd>u</kbd>: reopen close tab
 - <kbd>K</kbd>, <kbd>J</kbd>: select prev or next tab
 - <kbd>g0</kbd>, <kbd>g$</kbd>: select first or last tab
@@ -50,7 +51,7 @@ The default mappings are as follows:
 - <kbd>[</kbd><kbd>[</kbd>, <kbd>]</kbd><kbd>]</kbd>: find  prev or next links and open it
 - <kbd>g</kbd><kbd>u</kbd>: go to parent directory
 - <kbd>g</kbd><kbd>U</kbd>: go to root directory
-- <kbd>g</kbd><kbd>i</kbd>, <kbd>G</kbd>: focus first input
+- <kbd>g</kbd><kbd>i</kbd>: focus first input
 
 #### Misc
 - <kbd>z</kbd><kbd>i</kbd>, <kbd>z</kbd><kbd>o</kbd>: zoom-in/zoom-out
@@ -102,6 +103,26 @@ Open a URL or search keywords by search engine in new window.
 
 Select tabs by URL or title matched by keywords.
 
+#### `:set` command
+
+`:set` command can set properties on console.
+
+##### `smoothscroll` property
+
+Enable/disable smooth scroll.
+```
+:set smoothscroll   " enable smooth scroll
+:set nosmoothscroll " disable smooth scroll
+```
+
+##### `hintchars` property
+
+Set hint characters
+
+```
+:set hintchars=0123456789
+```
+
 ### Search engines
 
 Vim Vixen supports search by search engines like Google and Yahoo.
diff --git a/package-lock.json b/package-lock.json
index 0d5ffd8..1bd9ee9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -143,6 +143,16 @@
         }
       }
     },
+    "JSONStream": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/JSONStream/-/JSONStream-1.3.2.tgz",
+      "integrity": "sha1-wQI3G27Dp887hHygDCC7D85Mbeo=",
+      "dev": true,
+      "requires": {
+        "jsonparse": "1.3.1",
+        "through": "2.3.8"
+      }
+    },
     "abbrev": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.0.tgz",
@@ -199,6 +209,13 @@
         }
       }
     },
+    "addressparser": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/addressparser/-/addressparser-1.0.1.tgz",
+      "integrity": "sha1-R6++GiqSYhkdtoOOT9HTm0CCF0Y=",
+      "dev": true,
+      "optional": true
+    },
     "adm-zip": {
       "version": "0.4.7",
       "resolved": "https://registry.npmjs.org/adm-zip/-/adm-zip-0.4.7.tgz",
@@ -211,6 +228,24 @@
       "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8=",
       "dev": true
     },
+    "agent-base": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-2.1.1.tgz",
+      "integrity": "sha1-1t4Q1a9hMtW9aSQn1G/FOFOQlMc=",
+      "dev": true,
+      "requires": {
+        "extend": "3.0.1",
+        "semver": "5.0.3"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "5.0.3",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.0.3.tgz",
+          "integrity": "sha1-d0Zt5YnNXTyV8TiqeLxWmjy10no=",
+          "dev": true
+        }
+      }
+    },
     "ajv": {
       "version": "5.2.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.2.2.tgz",
@@ -252,6 +287,49 @@
       "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
       "dev": true
     },
+    "amqplib": {
+      "version": "0.5.2",
+      "resolved": "https://registry.npmjs.org/amqplib/-/amqplib-0.5.2.tgz",
+      "integrity": "sha512-l9mCs6LbydtHqRniRwYkKdqxVa6XMz3Vw1fh+2gJaaVgTM6Jk3o8RccAKWKtlhT1US5sWrFh+KKxsVUALURSIA==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "bitsyntax": "0.0.4",
+        "bluebird": "3.5.0",
+        "buffer-more-ints": "0.0.2",
+        "readable-stream": "1.1.14",
+        "safe-buffer": "5.1.1"
+      },
+      "dependencies": {
+        "isarray": {
+          "version": "0.0.1",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
+          "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
+          "dev": true,
+          "optional": true
+        },
+        "readable-stream": {
+          "version": "1.1.14",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz",
+          "integrity": "sha1-fPTFTvZI44EwhMY23SB54WbAgdk=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "core-util-is": "1.0.2",
+            "inherits": "2.0.3",
+            "isarray": "0.0.1",
+            "string_decoder": "0.10.31"
+          }
+        },
+        "string_decoder": {
+          "version": "0.10.31",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+          "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+          "dev": true,
+          "optional": true
+        }
+      }
+    },
     "ansi-escapes": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-2.0.0.tgz",
@@ -320,6 +398,12 @@
       "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
       "dev": true
     },
+    "array-filter": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/array-filter/-/array-filter-0.0.1.tgz",
+      "integrity": "sha1-fajPLiZijtcygDWB/SH2fKzS7uw=",
+      "dev": true
+    },
     "array-find-index": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-find-index/-/array-find-index-1.0.2.tgz",
@@ -336,6 +420,18 @@
         "es-abstract": "1.9.0"
       }
     },
+    "array-map": {
+      "version": "0.0.0",
+      "resolved": "https://registry.npmjs.org/array-map/-/array-map-0.0.0.tgz",
+      "integrity": "sha1-iKK6tz0c97zVwbEYoAP2b2ZfpmI=",
+      "dev": true
+    },
+    "array-reduce": {
+      "version": "0.0.0",
+      "resolved": "https://registry.npmjs.org/array-reduce/-/array-reduce-0.0.0.tgz",
+      "integrity": "sha1-FziZ0//Rx9k4PkR5Ul2+J4yrXys=",
+      "dev": true
+    },
     "array-slice": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/array-slice/-/array-slice-0.2.3.tgz",
@@ -363,12 +459,6 @@
       "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
       "dev": true
     },
-    "arraybuffer.slice": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.6.tgz",
-      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco=",
-      "dev": true
-    },
     "arrify": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/arrify/-/arrify-1.0.1.tgz",
@@ -419,6 +509,30 @@
       "integrity": "sha1-E8pRXYYgbaC6xm6DTdOX2HWBCUw=",
       "dev": true
     },
+    "ast-types": {
+      "version": "0.10.1",
+      "resolved": "https://registry.npmjs.org/ast-types/-/ast-types-0.10.1.tgz",
+      "integrity": "sha512-UY7+9DPzlJ9VM8eY0b2TUZcZvF+1pO0hzMtAyjBYKhOmnvRlqYNYnWdtsMj0V16CGaMlpL0G1jnLbLo4AyotuQ==",
+      "dev": true,
+      "optional": true
+    },
+    "astw": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/astw/-/astw-2.2.0.tgz",
+      "integrity": "sha1-e9QXhNMkk5h66yOba04cV6hzuRc=",
+      "dev": true,
+      "requires": {
+        "acorn": "4.0.13"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "4.0.13",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-4.0.13.tgz",
+          "integrity": "sha1-EFSVrlNh1pe9GVyCUZLhrX8lN4c=",
+          "dev": true
+        }
+      }
+    },
     "async": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/async/-/async-2.5.0.tgz",
@@ -440,6 +554,12 @@
       "integrity": "sha1-NhIfhFwFeBct5Bmpfb6x0W7DRUI=",
       "dev": true
     },
+    "async-limiter": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
+      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg==",
+      "dev": true
+    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -472,6 +592,16 @@
       "integrity": "sha1-g+9cqGCysy5KDe7e6MdxudtXRx4=",
       "dev": true
     },
+    "axios": {
+      "version": "0.15.3",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-0.15.3.tgz",
+      "integrity": "sha1-LJ1jiy4ZGgjqHWzJiOrda6W9wFM=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "follow-redirects": "1.0.0"
+      }
+    },
     "babel-cli": {
       "version": "6.24.1",
       "resolved": "https://registry.npmjs.org/babel-cli/-/babel-cli-6.24.1.tgz",
@@ -1449,6 +1579,50 @@
       "integrity": "sha1-ZlBsFs5vTWkopbPNajPKQelB43s=",
       "dev": true
     },
+    "bitsyntax": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/bitsyntax/-/bitsyntax-0.0.4.tgz",
+      "integrity": "sha1-6xDMb4K4xJDj6FaY8H6D1G4MuoI=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "buffer-more-ints": "0.0.2"
+      }
+    },
+    "bl": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-1.1.2.tgz",
+      "integrity": "sha1-/cqHGplxOqANGeO7ukHER4emU5g=",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "readable-stream": "2.0.6"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.0.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz",
+          "integrity": "sha1-j5A0HmilPMySh4jaz80Rs265t44=",
+          "dev": true,
+          "optional": true,
+          "requires": {
+            "core-util-is": "1.0.2",
+            "inherits": "2.0.3",
+            "isarray": "1.0.0",
+            "process-nextick-args": "1.0.7",
+            "string_decoder": "0.10.31",
+            "util-deprecate": "1.0.2"
+          }
+        },
+        "string_decoder": {
+          "version": "0.10.31",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+          "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+          "dev": true,
+          "optional": true
+        }
+      }
+    },
     "blob": {
       "version": "0.0.4",
       "resolved": "https://registry.npmjs.org/blob/-/blob-0.0.4.tgz",
@@ -1553,12 +1727,179 @@
       "integrity": "sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=",
       "dev": true
     },
+    "browser-pack": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/browser-pack/-/browser-pack-6.0.3.tgz",
+      "integrity": "sha512-Jo+RYsn8X8OhyP9tMXXg0ueR2fW696HUu1Hf3/DeiwNean1oGiPtdgGRNuUHBpPHzBH3x4n1kzAlgOgHSIq88g==",
+      "dev": true,
+      "requires": {
+        "JSONStream": "1.3.2",
+        "combine-source-map": "0.8.0",
+        "defined": "1.0.0",
+        "safe-buffer": "5.1.1",
+        "through2": "2.0.3",
+        "umd": "3.0.1"
+      }
+    },
+    "browser-resolve": {
+      "version": "1.11.2",
+      "resolved": "https://registry.npmjs.org/browser-resolve/-/browser-resolve-1.11.2.tgz",
+      "integrity": "sha1-j/CbCixCFxihBRwmCzLkj0QpOM4=",
+      "dev": true,
+      "requires": {
+        "resolve": "1.1.7"
+      },
+      "dependencies": {
+        "resolve": {
+          "version": "1.1.7",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
+          "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
+          "dev": true
+        }
+      }
+    },
     "browser-stdout": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.0.tgz",
       "integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8=",
       "dev": true
     },
+    "browserify": {
+      "version": "14.5.0",
+      "resolved": "https://registry.npmjs.org/browserify/-/browserify-14.5.0.tgz",
+      "integrity": "sha512-gKfOsNQv/toWz+60nSPfYzuwSEdzvV2WdxrVPUbPD/qui44rAkB3t3muNtmmGYHqrG56FGwX9SUEQmzNLAeS7g==",
+      "dev": true,
+      "requires": {
+        "JSONStream": "1.3.2",
+        "assert": "1.4.1",
+        "browser-pack": "6.0.3",
+        "browser-resolve": "1.11.2",
+        "browserify-zlib": "0.2.0",
+        "buffer": "5.0.8",
+        "cached-path-relative": "1.0.1",
+        "concat-stream": "1.5.2",
+        "console-browserify": "1.1.0",
+        "constants-browserify": "1.0.0",
+        "crypto-browserify": "3.11.1",
+        "defined": "1.0.0",
+        "deps-sort": "2.0.0",
+        "domain-browser": "1.1.7",
+        "duplexer2": "0.1.4",
+        "events": "1.1.1",
+        "glob": "7.1.2",
+        "has": "1.0.1",
+        "htmlescape": "1.1.1",
+        "https-browserify": "1.0.0",
+        "inherits": "2.0.3",
+        "insert-module-globals": "7.0.1",
+        "labeled-stream-splicer": "2.0.0",
+        "module-deps": "4.1.1",
+        "os-browserify": "0.3.0",
+        "parents": "1.0.1",
+        "path-browserify": "0.0.0",
+        "process": "0.11.10",
+        "punycode": "1.4.1",
+        "querystring-es3": "0.2.1",
+        "read-only-stream": "2.0.0",
+        "readable-stream": "2.3.3",
+        "resolve": "1.5.0",
+        "shasum": "1.0.2",
+        "shell-quote": "1.6.1",
+        "stream-browserify": "2.0.1",
+        "stream-http": "2.7.2",
+        "string_decoder": "1.0.3",
+        "subarg": "1.0.0",
+        "syntax-error": "1.3.0",
+        "through2": "2.0.3",
+        "timers-browserify": "1.4.2",
+        "tty-browserify": "0.0.0",
+        "url": "0.11.0",
+        "util": "0.10.3",
+        "vm-browserify": "0.0.4",
+        "xtend": "4.0.1"
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+      "dependencies": {
+        "browserify-zlib": {
+          "version": "0.2.0",
+          "resolved": "https://registry.npmjs.org/browserify-zlib/-/browserify-zlib-0.2.0.tgz",
+          "integrity": "sha512-Z942RysHXmJrhqk88FmKBVq/v5tqmSkDz7p54G/MGyjMnCFFnC79XWNbg+Vta8W6Wb2qtSZTSxIGkJrRpCFEiA==",
+          "dev": true,
+          "requires": {
+            "pako": "1.0.6"
+          }
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+          "version": "5.0.8",
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+          "dev": true,
+          "requires": {
+            "base64-js": "1.2.1",
+            "ieee754": "1.1.8"
+          }
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+        "concat-stream": {
+          "version": "1.5.2",
+          "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.5.2.tgz",
+          "integrity": "sha1-cIl4Yk2FavQaWnQd790mHadSwmY=",
+          "dev": true,
+          "requires": {
+            "inherits": "2.0.3",
+            "readable-stream": "2.0.6",
+            "typedarray": "0.0.6"
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+            "readable-stream": {
+              "version": "2.0.6",
+              "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz",
+              "integrity": "sha1-j5A0HmilPMySh4jaz80Rs265t44=",
+              "dev": true,
+              "requires": {
+                "core-util-is": "1.0.2",
+                "inherits": "2.0.3",
+                "isarray": "1.0.0",
+                "process-nextick-args": "1.0.7",
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+                "util-deprecate": "1.0.2"
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+            "string_decoder": {
+              "version": "0.10.31",
+              "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+              "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+              "dev": true
+            }
+          }
+        },
+        "https-browserify": {
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-      "integrity": "sha1-sw6GqhDV7zVGYBwJzeR2Xjgdo3c=",
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-        "component-emitter": "1.2.1",
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-        "indexof": "0.0.1",
-        "object-component": "0.0.3",
-        "parseuri": "0.0.5",
-        "socket.io-parser": "2.3.1",
-        "to-array": "0.1.4"
+        "ip": "1.1.5",
+        "smart-buffer": "1.1.15"
       },
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-          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.2.tgz",
-          "integrity": "sha1-riXPJRKziFodldfwN4aNhDESR2U=",
+        "ip": {
+          "version": "1.1.5",
+          "resolved": "https://registry.npmjs.org/ip/-/ip-1.1.5.tgz",
+          "integrity": "sha1-vd7XARQpCCjAoDnnLvJfWq7ENUo=",
           "dev": true
         }
       }
     },
-    "socket.io-parser": {
-      "version": "2.3.1",
-      "resolved": "https://registry.npmjs.org/socket.io-parser/-/socket.io-parser-2.3.1.tgz",
-      "integrity": "sha1-3VMgJRA85Clpcya+/WQAX8/ltKA=",
+    "socks-proxy-agent": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/socks-proxy-agent/-/socks-proxy-agent-2.1.1.tgz",
+      "integrity": "sha512-sFtmYqdUK5dAMh85H0LEVFUCO7OhJJe1/z2x/Z6mxp3s7/QPf1RkZmpZy+BpuU0bEjcV9npqKjq9Y3kwFUjnxw==",
       "dev": true,
       "requires": {
-        "component-emitter": "1.1.2",
-        "debug": "2.2.0",
-        "isarray": "0.0.1",
-        "json3": "3.3.2"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "2.2.0",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
-          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
-          "dev": true,
-          "requires": {
-            "ms": "0.7.1"
-          }
-        },
-        "isarray": {
-          "version": "0.0.1",
-          "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
-          "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
-          "dev": true
-        },
-        "ms": {
-          "version": "0.7.1",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
-          "integrity": "sha1-nNE8A62/8ltl7/3nzoZO6VIBcJg=",
-          "dev": true
-        }
+        "agent-base": "2.1.1",
+        "extend": "3.0.1",
+        "socks": "1.1.10"
       }
     },
     "sort-keys": {
@@ -7420,6 +9668,16 @@
         "readable-stream": "2.3.3"
       }
     },
+    "stream-combiner2": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/stream-combiner2/-/stream-combiner2-1.1.1.tgz",
+      "integrity": "sha1-+02KFCDqNidk4hrUeAOXvry0HL4=",
+      "dev": true,
+      "requires": {
+        "duplexer2": "0.1.4",
+        "readable-stream": "2.3.3"
+      }
+    },
     "stream-http": {
       "version": "2.7.2",
       "resolved": "https://registry.npmjs.org/stream-http/-/stream-http-2.7.2.tgz",
@@ -7433,6 +9691,39 @@
         "xtend": "4.0.1"
       }
     },
+    "stream-splicer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/stream-splicer/-/stream-splicer-2.0.0.tgz",
+      "integrity": "sha1-G2O+Q4oTPktnHMGTUZdgAXWRDYM=",
+      "dev": true,
+      "requires": {
+        "inherits": "2.0.3",
+        "readable-stream": "2.3.3"
+      }
+    },
+    "streamroller": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/streamroller/-/streamroller-0.7.0.tgz",
+      "integrity": "sha512-WREzfy0r0zUqp3lGO096wRuUp7ho1X6uo/7DJfTlEi0Iv/4gT7YHqXDjKC2ioVGBZtE8QzsQD9nx1nIuoZ57jQ==",
+      "dev": true,
+      "requires": {
+        "date-format": "1.2.0",
+        "debug": "3.1.0",
+        "mkdirp": "0.5.1",
+        "readable-stream": "2.3.3"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+          "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+          "dev": true,
+          "requires": {
+            "ms": "2.0.0"
+          }
+        }
+      }
+    },
     "strict-uri-encode": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz",
@@ -7533,6 +9824,23 @@
         "schema-utils": "0.3.0"
       }
     },
+    "subarg": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/subarg/-/subarg-1.0.0.tgz",
+      "integrity": "sha1-9izxdYHplrSPyWVpn1TAauJouNI=",
+      "dev": true,
+      "requires": {
+        "minimist": "1.2.0"
+      },
+      "dependencies": {
+        "minimist": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+          "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
+          "dev": true
+        }
+      }
+    },
     "supports-color": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@@ -7572,6 +9880,23 @@
         }
       }
     },
+    "syntax-error": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/syntax-error/-/syntax-error-1.3.0.tgz",
+      "integrity": "sha1-HtkmbE1AvnXcVb+bsct3Biu5bKE=",
+      "dev": true,
+      "requires": {
+        "acorn": "4.0.13"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "4.0.13",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-4.0.13.tgz",
+          "integrity": "sha1-EFSVrlNh1pe9GVyCUZLhrX8lN4c=",
+          "dev": true
+        }
+      }
+    },
     "table": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/table/-/table-4.0.1.tgz",
@@ -7633,6 +9958,23 @@
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
+    "through2": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.3.tgz",
+      "integrity": "sha1-AARWmzfHx0ujnEPzzteNGtlBQL4=",
+      "dev": true,
+      "requires": {
+        "readable-stream": "2.3.3",
+        "xtend": "4.0.1"
+      }
+    },
+    "thunkify": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/thunkify/-/thunkify-2.1.2.tgz",
+      "integrity": "sha1-+qDp0jDFGsyVyhOjYawFyn4EVT0=",
+      "dev": true,
+      "optional": true
+    },
     "time-stamp": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/time-stamp/-/time-stamp-2.0.0.tgz",
@@ -7649,6 +9991,13 @@
         "setimmediate": "1.0.5"
       }
     },
+    "timespan": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/timespan/-/timespan-2.3.0.tgz",
+      "integrity": "sha1-SQLOBAvRPYRcj1myfp1ZutbzmSk=",
+      "dev": true,
+      "optional": true
+    },
     "tmp": {
       "version": "0.0.31",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.31.tgz",
@@ -7709,6 +10058,13 @@
       "integrity": "sha1-OTvnMKlEb9Hq1tpZoBQwjzbCics=",
       "dev": true
     },
+    "tsscmp": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/tsscmp/-/tsscmp-1.0.5.tgz",
+      "integrity": "sha1-fcSjOvcVgatDN9qR2FylQn69mpc=",
+      "dev": true,
+      "optional": true
+    },
     "tty-browserify": {
       "version": "0.0.0",
       "resolved": "https://registry.npmjs.org/tty-browserify/-/tty-browserify-0.0.0.tgz",
@@ -7811,10 +10167,16 @@
         "webpack-sources": "1.0.1"
       }
     },
-    "ultron": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/ultron/-/ultron-1.0.2.tgz",
-      "integrity": "sha1-rOEWq1V80Zc4ak6I9GhTeMiy5Po=",
+    "umd": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/umd/-/umd-3.0.1.tgz",
+      "integrity": "sha1-iuVW4RAR9jwllnCKiDclnwGz1g4=",
+      "dev": true
+    },
+    "underscore": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.7.0.tgz",
+      "integrity": "sha1-a7rwh3UA02vjTsqlhODbn+8DUgk=",
       "dev": true
     },
     "uniq": {
@@ -7933,6 +10295,13 @@
       "integrity": "sha512-DIWtzUkw04M4k3bf1IcpS2tngXEL26YUD2M0tMDUpnUrz2hgzUBlD55a4FjdLGPvfHxS6uluGWvaVEqgBcVa+g==",
       "dev": true
     },
+    "uws": {
+      "version": "0.14.5",
+      "resolved": "https://registry.npmjs.org/uws/-/uws-0.14.5.tgz",
+      "integrity": "sha1-Z6rzPEaypYel9mZtAPdpEyjxSdw=",
+      "dev": true,
+      "optional": true
+    },
     "v8flags": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-2.1.1.tgz",
@@ -8073,6 +10442,13 @@
       "integrity": "sha1-nITsLc9oGH/wC8ZOEnS0QhduHIQ=",
       "dev": true
     },
+    "when": {
+      "version": "3.7.8",
+      "resolved": "https://registry.npmjs.org/when/-/when-3.7.8.tgz",
+      "integrity": "sha1-xxMLan6gRpPoQs3J56Hyqjmjn4I=",
+      "dev": true,
+      "optional": true
+    },
     "whet.extend": {
       "version": "0.9.9",
       "resolved": "https://registry.npmjs.org/whet.extend/-/whet.extend-0.9.9.tgz",
@@ -8166,33 +10542,18 @@
         "mkdirp": "0.5.1"
       }
     },
-    "ws": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-1.1.2.tgz",
-      "integrity": "sha1-iiRPoFJAHgjJiGz0SoUYnh/UBn8=",
-      "dev": true,
-      "requires": {
-        "options": "0.0.6",
-        "ultron": "1.0.2"
-      }
-    },
-    "wtf-8": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/wtf-8/-/wtf-8-1.0.0.tgz",
-      "integrity": "sha1-OS2LotDxw00e4tYw8V0O+2jhBIo=",
-      "dev": true
-    },
     "xml-char-classes": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/xml-char-classes/-/xml-char-classes-1.0.0.tgz",
       "integrity": "sha1-ZGV4SKIP/F31g6Qq2KJ3tFErvE0=",
       "dev": true
     },
-    "xmlhttprequest-ssl": {
-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.3.tgz",
-      "integrity": "sha1-GFqIjATspGw+QHDZn3tJ3jUomS0=",
-      "dev": true
+    "xregexp": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/xregexp/-/xregexp-2.0.0.tgz",
+      "integrity": "sha1-UqY+VsoLhKfzpfPWGHLxJq16WUM=",
+      "dev": true,
+      "optional": true
     },
     "xtend": {
       "version": "4.0.1",
diff --git a/package.json b/package.json
index 05e3ff5..368a4ec 100644
--- a/package.json
+++ b/package.json
@@ -31,14 +31,14 @@
     "eslint": "^4.7.0",
     "eslint-plugin-react": "^7.4.0",
     "html-webpack-plugin": "^2.30.1",
-    "karma": "^1.7.0",
+    "karma": "^2.0.0",
     "karma-firefox-launcher": "^1.0.1",
     "karma-html2js-preprocessor": "^1.1.0",
     "karma-mocha": "^1.3.0",
     "karma-mocha-reporter": "^2.2.3",
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^2.0.4",
-    "mocha": "^4.0.1",
+    "mocha": "^5.0.0",
     "node-sass": "^4.5.3",
     "preact": "^8.2.6",
     "sass-loader": "^6.0.6",
diff --git a/src/shared/utils/dom.js b/src/shared/utils/dom.js
index f138c33..974d534 100644
--- a/src/shared/utils/dom.js
+++ b/src/shared/utils/dom.js
@@ -83,7 +83,9 @@ const viewportRect = (e) => {
 
 const isVisible = (element) => {
   let rect = element.getBoundingClientRect();
-  if (rect.width === 0 || rect.height === 0) {
+  let style = window.getComputedStyle(element);
+
+  if (style.overflow !== 'visible' && (rect.width === 0 || rect.height === 0)) {
     return false;
   }
   if (rect.right < 0 && rect.bottom < 0) {