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copied!<h2>I see two issues with your code.</h2> <ol> <li><p>You cannot use inline script blocks in your background page -- js code can only be run from a linked script (like so: <code><script type="text/javascript" src="background.js"></script></code>). This is because of the <a href="http://developer.chrome.com/trunk/extensions/contentSecurityPolicy.html#JSExecution" rel="nofollow noreferrer">Content Security Policy</a>.</p></li> <li><p>As noted in abraham's answer, since you want the icon to appear for all pages, you should use browser_action, not page_action. According to <a href="https://developer.chrome.com/extensions/pageAction.html#tips" rel="nofollow noreferrer">Google's pageAction documentation page</a>: </p> <blockquote> <p>Don't use page actions for features that make sense for most pages. Use browser actions instead.</p> </blockquote> <p>Icons for page actions appear inside the omnibar (Chrome's address bar), while icons for browser actions appear as a toolbar button next to the omnibar. Either can be used to reflect the status of the plugin and as an action button.</p></li> </ol> <h2>Solutions</h2> <p>To get the icon to appear, you have to call: <code>chrome.pageAction.show(tabId)</code>. However, you cannot just call this from a content script, because chrome.pageAction.show() must be passed the tabId, and tabId is retrieved from chrome.tabs, and <a href="http://developer.chrome.com/extensions/content_scripts.html" rel="nofollow noreferrer">chrome.tabs is not accessible from content scripts</a>.</p> <p>To add a browser action button and define it's behavior when clicked, define the browser_action element in your manifest.json file ...</p> <pre><code>"browser_action": { "default_title": "action description", "default_icon": "icon.png" } </code></pre> <p>... and place this code in your background script:</p> <pre><code>// Define behavior when browser action icon is clicked chrome.browserAction.onClicked.addListener(function(tab) { // executed when the user clicks on the browser action icon }); </code></pre> <p><strong>Or</strong>, if you want to go against convention and use a pageAction, you can use the manifest.json code from your question and place the following into your background script:</p> <pre><code>// Show page action icon in omnibar. function showPageAction( tabId, changeInfo, tab ) { chrome.pageAction.show(tabId); }; // Call the above function when the url of a tab changes. chrome.tabs.onUpdated.addListener(showPageAction); </code></pre> <p>For further research, check out the source code of some of their <a href="https://developer.chrome.com/extensions/samples.html" rel="nofollow noreferrer">sample extensions</a>.</p>

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