Diễn đàn hỗ trợ Firefox

Tried four times in a row. Had the problem In 142.01. Updated to 143.01. No help.

First image is after the update attempt. I intentionally chose not to update 3 of them

Second image after relaunch.

I'm having trouble getting my extensions to show up in the toolbar. Every help article has you start with the puzzle piece icon for extensions, but this is missing from my toolbar. I've tried right clicking to 'customize toolbar' and I am able to drag a extensions icon around, but it's grayed out and doesn't appear when I apply the new settings. This is making my browser virtually unusable since I can't access my password manager, etc.

In short, the extensions icon is missing from my toolbar and no menu options I've found will restore it. Please help!

Current response is as follows:-

Oops! We can’t find that page

If you’ve followed a link from another site for an extension or theme, that item is no longer available. This could be because:

   The developer removed it. Developers commonly do this because they no longer support the extension or theme, or have replaced it.
   Mozilla removed it. This can happen when issues are found during the review of the extension or theme, or the extension or theme has been abusing the terms and conditions for addons.mozilla.org. The developer has the opportunity to resolve the issues and make the add-on available again.

Try visiting the page later, as the theme or extension may become available again. Alternatively, you may be able to find what you’re looking for in one of the available extensions or themes, or by asking for help on our community forums.

On the https://addons.mozilla.org/en-US/firefox/addon/nordvpn-proxy-extension/ tab, NordVPN appears to be installed as the button indicates "Remove". I have logged into NordVPN but do not have the NordVPN icon in top-right corner.

Configuration: Windows 10 just installed: October 14, 2025—KB5066791 (OS Builds 19044.6456 and 19045.6456) FireFox: 143.0.4 (64-bit)

Hi everyone,

I recently built a small Firefox extension for my website https://calcolo-stpendionetto.it https://calcolo-stpendionetto.it , which helps users calculate their net salary in Italy using updated IRPEF and INPS rates.

However, when I try to upload the extension to addons.mozilla.org addons.mozilla.org (AMO), I keep getting this error message: Signing is not possible due to an error with the manifest file

{

 "manifest_version": 2,
 "name": "Calcolo Stipendio Netto",
 "version": "1.0",
 "description": "Calculate your Italian net salary (IRPEF, INPS, regional tax) quickly.",
 "icons": {
   "48": "icons/icon48.png",
   "128": "icons/icon128.png"
 },
 "browser_action": {
   "default_popup": "popup.html"
 },
 "permissions": ["activeTab"]

} I also tried switching to manifest_version 3, but then Firefox gave a warning that some properties like browser_action are deprecated or not recognized.

Has anyone experienced the same issue when uploading finance or calculator-related extensions? Is there a new manifest format or signing rule I might be missing for Firefox extensions?

Any help or examples from working extensions would be greatly appreciated. Marien Klin

With the latest update to Firefox, 147.0.1, our test suites run with the extension, Selenium IDE, has errors, "Failed:n.createEvent(...).initKeyEvent is not a function". I am running the latest version of Selenium IDE. Installing the previous version of FF has no errors. What is the solution?

I am trying to open a site, but keep getting this message: "Before you continue to the website...

By clicking the "Accept and Continue" button, you will be redirected to the Firefox Add-ons Store to install this extension. By clicking the "Accept and Continue" button and installing this extension in your browser, you accept the Terms and Conditions, Privacy Policy, and agree to select "Recipio" as your new search engine. Firefox Add-ons Accept and Continue" I do not want to add it - why am I being forced to add it?

There are many Recommended extensions that are doing so very shady things (collecting user data that shouldn't be necessary for the task the extension is doing, storing user data, sharing data with less then trustworthy 3rd parties, using bullying tactics to get people to subscribe and so on). Many of these extensions change their privacy policies or their monetization practices after you've given them a Recommended badge and you then blissfully continue to suggest the extension after these changes.