diff --git a/README.md b/README.md
index f31f1e2..db69683 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ The default mappings are as follows:
 - <kbd>/</kbd>: start to find a keyword in the page
 - <kbd>n</kbd>: find next keyword in the page
 - <kbd>N</kbd>: find prev keyword in the page
+- <kbd>g</kbd><kbd>f</kbd>: view page source
 
 ### Console commands
 
diff --git a/src/background/actions/operation.js b/src/background/actions/operation.js
index 56eb168..c477ce7 100644
--- a/src/background/actions/operation.js
+++ b/src/background/actions/operation.js
@@ -77,6 +77,11 @@ const exec = (operation, tab) => {
     return browser.tabs.sendMessage(tab.id, {
       type: messages.CONSOLE_HIDE,
     });
+  case operations.PAGE_SOURCE:
+    return browser.tabs.create({
+      url: 'view-source:' + tab.url,
+      index: tab.index + 1
+    });
   default:
     return Promise.resolve();
   }
diff --git a/src/shared/operations.js b/src/shared/operations.js
index a2f980f..e8cc8cf 100644
--- a/src/shared/operations.js
+++ b/src/shared/operations.js
@@ -37,6 +37,9 @@ export default {
   // Focus
   FOCUS_INPUT: 'focus.input',
 
+  // Page
+  PAGE_SOURCE: 'page.source',
+
   // Tabs
   TAB_CLOSE: 'tabs.close',
   TAB_CLOSE_FORCE: 'tabs.close.force',
diff --git a/src/shared/settings/default.js b/src/shared/settings/default.js
index 3c4dcac..f82db5a 100644
--- a/src/shared/settings/default.js
+++ b/src/shared/settings/default.js
@@ -46,6 +46,7 @@ export default {
     "gu": { "type": "navigate.parent" },
     "gU": { "type": "navigate.root" },
     "gi": { "type": "focus.input" },
+    "gf": { "type": "page.source" },
     "y": { "type": "urls.yank" },
     "p": { "type": "urls.paste", "newTab": false },
     "P": { "type": "urls.paste", "newTab": true },