First off, important warnings: Warning: Chrome 92 or older doesn’t show errors occurred in the service worker – it was a bug, fixed in newer Chrome, which now shows the errors in chrome://extensions page. These old versions of Chrome can’t register the background script if an unhandled exception occurs during its compilation (a syntax error … Read more
ManifestV3 update This answer is adapted from https://stackoverflow.com/a/11348302/1754517. This has been tested with both Manifest V2 and V3. Tested in Google Chrome 99.0.4844.51 64-bit (Windows 10). Replace the content of focus.js with: if (location.search !== “?x”) { location.search = “?x”; throw new Error; // load everything on the next page; // stop execution on this … Read more
ManifestV3 service worker doesn’t have any DOM/document/window. ManifestV3/V2 extension pages (and the scripts inside) have their own DOM, document, window, and a chrome-extension:// URL (use devtools for that part of the extension to inspect it). You need a content script to access DOM of web pages and interact with a tab’s contents. Content scripts will … Read more
Note you must have the tabs permission set in your manifest file “permissions”: [ “tabs” ], http://developer.chrome.com/extensions/tabs.html or the activeTab permission if initiated by a click on the extension button[Xan] https://developer.chrome.com/extensions/activeTab Code: chrome.tabs.query({currentWindow: true, active: true}, function(tabs){ console.log(tabs[0].url); });
The result of a script is the last expression being evaluated. So in your example you could use: chrome.tabs.executeScript( null, {code:”var x = 10; x”}, function(results){ console.log(results); } ); This will log [10] to the extension’s console. results is actually an array of values because if the page has more than one frame you can … Read more
Chrome extensions with the tabs permission can use the chrome.windows.create method: chrome.windows.create({“url”: url, “incognito”: true}); However, to access it, you’ll either need to write your own extension or find an existing one which provides a suitable hook (I don’t know whether this can be done with “Mouse Stroke”—I’m too scared to look).
Declare a content script in the manifest file with “run_at”: “document_start” to get it to run as soon as possible, i.e. right after constructing the document root (when <head> does not exist yet). For your very specific example, it might be better to declare a content style instead, similar to content scripts, but using the … Read more
Let’s start with the easiest problem: Refused to execute inline script because … $(‘div’, this) selects all <div> elements within a <td>. In the source code you provided, the following event handler can be found: <div class=”smallfont”> <span style=”cursor:pointer” onclick=”window.open(‘member.php?u=47995’, ‘_self’)”>K4raMong</span> </div> By the default Content Security policy, this is forbidden. To get rid off … Read more
The global variables of a content script and a page-level injected script are isolated. Content scripts execute in a special environment called an isolated world. They have access to the DOM of the page they are injected into, but not to any JavaScript variables or functions created by the page. It looks to each content … Read more
There is no such event in the Chrome Extension API. There is however a chrome.windows.onRemoved event that fires each time a window closes. I figured you could check in this event if you closed the last window, but unfortunately due to the asynchronous nature of Chrome this doesn’t work. What I tried was running a … Read more