The following code sometimes throws an exception in Firefox: try { videoElem.load(); } catch (ignored) {} The error: Uncaught (in promise) DOMException: The fetching process for the media resource was aborted by the user agent at the user's request. I…
I have a simple web page with a button and a div. The button has a click event listener that logs to the console when clicked. The div has a pointerdown event listener that calls setPointerCapture to capture pointer events.…
I just followed this example https://developer.mozilla.org/en-US/docs/Web/API/Document/requestStorageAccess#examples to request localStorage access for a cross domain iframe. This works in Chrome. but in Firefox the handle is undefined. I can confirm that the localStorage access has been granted. Any idea why the…
I have updated Firefox to the latest version (131.0.3). Though the property is supported in FF 103+, on https://developer.mozilla.org/en-US/docs/Web/CSS/backdrop-filter I'm seeing: Both layout.css.backdrop-filter.enabled and layout.css.backdrop-filter.force-enabled are set to true. What can be wrong with the settings?
Microsoft Teams stopped working in Firefox. I got the "Oops, failed to init! - Retry" message. I run Ubuntu 24.04.1 Gnome.
I'm using the following HTML, CSS and Javascript to disguise a video player as an audio player. It works perfectly in Firefox but in Chrome pressing the play button does not actually play anything. What is preventing it from working…
new URL(`http://12345678901`) is not valid but new URL(`http://1234567890`) and new URL(`http://a12345678901`) are. these work: console.log(new URL(`http://1234567890`)) console.log(new URL(`http://a12345678901`)) This does not: console.log(new URL(`http://12345678901`)) Here's the error in chrome: VM2064:1 Uncaught TypeError: Failed to construct 'URL': Invalid URL at :1:1 (anonymous)…
I am writing a first test of a firefox extension. I am using the following websites as assistance: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Your_first_WebExtension https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/user_interface/Context_menu_items https://github.com/mdn/webextensions-examples/blob/main/menu-demo/background.js Here is my code: mainfest.json { "manifest_version":2, "version":"1.0", "name":"Test", "content_scripts":[ { "matches":["<all_urls>"], "js":["main.js"] } ], "permissions":["contextMenus"] } main.js alert("test");…
I've a function, which should remove a li element from a list identified by the id. I use jQuery and this call $("#selector").find("li[id='" + id.substring(4) + "']").remove(); The call started with a click on a button. In Firefox it works…
I made a button with an gradient animation border that is rotation. It works fine in Safari & Chrome, but in Firefox it's lacking the smooth keyframes. I tried to add the -moz- but it didn't work. Any suggestions how…