Questions tagged [firefox-extensions]

Questions related to extensions or plugins that enable, disable or extend the functionality of Mozilla Firefox

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18 views

What user-agent does DownThemAll add on extension convey to servers when executing within 2020 versions of Firefox Browsers? Any easy way to check?

What user-agent does DownThemAll add on extension convey to servers when executing within 2020 versions of Firefox Browsers? Any easy way to check? The last googled info I could find on this was ...
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1answer
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How do I install an add-on from a file in Firefox?

I am running Mozilla Firefox 76.0.1. I would like to install an add-on from a .xpi file. This question was asked 10 years ago here, but the answer has changed. Now, whether I open the add-on from ...
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Browser Extension: Show Link URLs [closed]

I'm looking for a chrome/firefox extension or javascript bookmarklet that adds the URL for all links after the <a /> element. This is sometimes useful when printing websites that contain many ...
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10 views

How to save settings of “YouTube Enhancer” add-on?

I've added the YouTube Enhancer extension to my Firefox and am trying to change some of the settings, such as the preferred video quality, or volume-level. I can make the changes to my heart's ...
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1answer
22 views

unwanted advertising tabs open in every 20 mins in Firefox [duplicate]

my usb stick was containing som kind of virus which was visible and my little brother double clicked on it! and now my laptop is infected!! the virus opens several Firefox tabs and opens some websites ...
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24 views

Unable to find proxy with Windscribe add-on

I've been having some trouble with my Internet connection for a few weeks now, and I'm linking a reference because it may be related. In spite of having that sort of problem, I could connect to some ...
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59 views

Is there a Chrome equivalent for Firefox's multi-account container extension?

I just found out about Firefox's multi-account container extension. For those unfamiliar, this is a good overview...https://youtu.be/Gy7lyvAfOSw. It seems like a fantastic solution for being able to ...
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working wtih multiple projects with many browser tabs [duplicate]

I work as a software developer and I usually have two or more projects on the go. During the day I will work on each of those projects but one at a time. It involves having a lot of web pages open ...
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1answer
27 views

Open firefox bookmark in private mode

Can a bookmark be opened in a private tab by editing the bookmark location ? On Reddit I seen a reference to prefix the bookmark link with private:///# : https://www.reddit.com/r/firefox/comments/...
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203 views

Emulate Cursor Inside Firefox Window when Screen Sharing

When using a meeting service like Jitsi or Google Hangouts with Firefox I regurarly share another window (could be Firefox itself). In this shared window I want to point to certain things when ...
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35 views

How can I enable dark mode on Firefox on Windows 7 so that a webpage being loaded is dark and not white?

How can I enable dark mode on Firefox on Windows 7 SP1 x64 Ultimate so that a webpage being loaded is dark and not white? Example showing the issue: https://youtu.be/eh-DqoF1_m8 I unsuccessfully ...
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How to download a website's source maps?

I don't want to write a complete script for this; there must be some simple way to download source maps. By this I mean go to a website (assuming it has source maps) in Firefox, open Developer Tools, ...
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74 views

How can I enable dark mode on Firefox on Windows 7 so that the settings page has a dark mode?

How can I enable dark mode on Firefox on Windows 7 so that the settings page (about:preferences#home) has a dark mode? I unsuccessfully tried: using the Dark Reader Firefox extension. using Firefox' ...
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How to diagnose Firefox issues not caused by extensions or user.js tweaks? (corollary: how to copy extension data to new FF profile?)

Firefox has been failing to load certain sites* lately. While I do some pretty heavy browser customization, it's all limited to extensions and user.js tweaks. Obviously my first thought was to check ...
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How to search within all my opened chrome windows and tabs for keywords from a certain page title?

Having a pretty strong computer configuration with 32GB or RAM among other things I tend to open a huge amount of web pages with chrome so I might end up with 10 chrome windows, each of them having 10-...
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1answer
29 views

How can I “assign” a tab to be active?

I'm using firefox, some sites require its tab to be open for it to do its thing... I've tried the "Disable Page Visibility API" add-on, but it doesn't seem to do the trick here. the tab only "...
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19 views

Firefox extensions: avoiding possible username/password leaks

I understand a FF extension cannot read info stored in the password manager but, with suitable permission/s (see Firefox extensions: permissions that let grabbing username/password) it can read a user/...
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1answer
28 views

Firefox extensions: permissions that let grabbing username/password

What specific permissions would allow a Firefox extension to grab my username and password, either if I enter them by hand or retrieved from the password manager? (It would be great to have links to ...
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1answer
130 views

Programmatically close all tabs in Firefox Quantum

1. Summary I can't find, how I can close all tabs in Firefox Quantum without any manual mouse clicks. 2. Details (Details for preventing XY Problem) I am working on several projects. I need always ...
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26 views

Restore the Firefox new tab page after being changed by an extension

A Firefox extension I have installed has taken control of the new tab page. I want to keep using the extension, but use the original new tab page (about:newtab). The extension offers a toggle to "use ...
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1answer
28 views

How bad is remote code execution in browser plugins?

There was a Firefox addon installed on my PC which is now blocked for executing remote code. Does a Firefox plugin have enough privileges to make change to the system (Windows) and "install" another ...
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3answers
150 views

How can I determine the add-on that's causing this sketchy pop-up I'm seeing in Firefox on MacOS?

How can I determine the extension that's causing this sketchy pop-up I'm seeing in Firefox? I've determined: The pop-up appears reliably immediately after Firefox starts with this profile. It still ...
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1answer
45 views

How to reduce website bandwidth usage on Firefox PC using 4G/LTE

In Firefox 73+, how to reduce bandwidth usage? Some websites take up to 5Mb of bandwidth just to load the main page. I'm already using uMatrix and uBlock Origin addons.
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31 views

Howto get rid of white screen splashes between pages with DarkReader on Firefox?

I'm using the latest Firefox 73.0 on Ubuntu 18.04. And I'm using the DarkReader AddOn (Or here at GitHUB) at night, which takes care of automatically creating a dark background to reduce eyestrain. ...
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1answer
34 views

Meaning of the notification Firefox seems slow to start?

Hi Firefox experts, When launching Firefox, it sometimes displays at the bottom a notification saying "Mozilla Firefox seems slow... to... start." Is this an official notification type within ...
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36 views

Restrict firefox extensions or only activate them manually for certain tabs for more privacy protection

Some firefox extensions require quite intrusive permissions, which can be understandable depending on what the extension does, but would not be necessary to be granted all the time. Is there a simple ...
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1answer
88 views

Disable Drag and Drop tabs in FIREFOX

1) Is there a way to disable drag and drop of tabs in firefox and only enable it when I drag tabs while holding the control button? 2) A way to undo the last drag and drop using a keyboard shortcut? ...
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47 views

Vertical toolbar in Firefox Quantum 68.4.1esr?

After the move to Web Extensions, the Vertical Toolbars add-on stopped working. Noone has bothered to make a WE version. Is this because it can't be done? I really miss Vertical Toolbars, All-in-...
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3answers
2k views

Firefox - how to refresh an open tab automatically every x minutes?

can someone help please in the following situation: You have multiple tabs open in Firefox. While you are surfing across different tabs, you would like a specific tab (tab "A") to refresh itself ...
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1answer
17 views

how to use ctrl + 1 to switch to previous tab in firefox?

I'm using firefox 71 in mac os, i'd like to use ctrl+1 to switch to previous tab rather than command+shift+tab, how to achieve this? i tried an add-on called custom key but not working, i also tried ...
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1answer
148 views

Add random number as query parameter to avoid caching with Chrome extension?

Is there a way to add the current timestamp as query parameters? I think it could be useful to avoid any cache issue. Originally Asked here - https://twitter.com/tcoppin_/status/1209131288965341190
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2answers
92 views

Reviewing Firefox Extensions - When was it installed?

I wish to review my Firefox Extensions, specifically I want to know the date when I installed all my extensions. Is this possible? I know about Review installed extensions | Firefox Help support ...
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1answer
109 views

How to change domain of URL keeping params same using Requestly Chrome extension?

I need to change request domain, but keep params on the same, can Requestly extension do it? For Example www.domain1.com?a=1&b=2 --> www.domain2.com?a=1&b=2 PS - The question was asked ...
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39 views

How to change position/order of addon/extension in firefox?

how to I change position/order of addon/extension in Firefox? I'm using the latest version available.
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0answers
40 views

What happened to all the FIrefox extensions? [closed]

As I experiment with Firefox-based browsers, I stumble across missing functionality that I'd like to restore. It's the usual game of cat and mouse: Firefox removes a feature, you go find an extension ...
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28 views

stop Ghostery from showing when launching Firefox

Ever since I installed Ghostery (8.4.5), whenever I launch Firefox (71.0, 64-bit), Ghostery will show in a tab. Possible to disable that by some settings? I went through the settings but couldn't find ...
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155 views

user scripts like Greasemonkey are no longer editable in firefox 71 (they were working fine in the 6x version)

Just updated to Firefox 71 after not updating for more than an year. Now violentmonkey scripts can't be edited. Then also can't be switched on or off. They were working well in the 6x version of ...
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1answer
43 views

Why is an extra, manual page load always required in Firefox for Greasemonkey/uBlock Origin to kick in?

I have some shortcuts to open Firefox, like this: "C:\Program Files\Mozilla Firefox\firefox.exe" -p "Twitch profile" --no-remote "https://www.twitch.tv/directory/game/somegame" When I run that ...
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1answer
45 views

How do I prevent Firefox extensions from forcefully opening their webpages without my consent or permission?

Every now and then, I come back to my Firefox having opened the "I don't care about cookies" blog, with some "news" which I don't care about one bit (no pun intended). The whole point of the extension ...
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0answers
19 views

How to set cursor solid instead of blinking in Mozilla Firefox in mac os?

In windows 10, i can set the cursor animation style to solid in control panel, and both Chrome and Firefox works, I wonder how to make this in mac os using firefox? i've searched some, How to ...
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1answer
93 views

In Firefox, how a website can be as default page of 'side view' addon when it's launched?

Side view addon is opened with a Welcome page by default in Firefox. Is it possible to change this behaviour, replacing default page with a website page?
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21 views

How to find out which Firefox extension prints to console

One of the Firefox extensions I installed prints 'undefined' to the console. It happens in a file cs.js. Is there any way to find out which extension does that, apart from disabling them one by one?
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1answer
63 views

How to change the domain of URL without changing query parameters using Requestly?

My first use case would be to change the domain of a URL without changing the rest of the parameters using Requestly. Specifically change from https://web.whatsapp.com/send?phone=123&text=Hi ...
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1answer
946 views

How to download Firefox extension as .xpi-file manually from another browser?

How is it possible to download a firefox extension as .xpi-file from the official site https://addons.mozilla.org/ if not using firefox as a browser? https://addons.mozilla.org/ in this case just ...
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1answer
253 views

Does Firefox 70's Enhanced Tracking Protection obsolete certain extensions?

Now that Firefox 70 has Enhanced Tracking Protection, are various major plugins obsolete? I'm using these security-related extensions: Disconnect uBlock Origin Privacy Badger Are they still ...
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14 views

Add a textbox to the firefox browser toolbar

I am trying to add a textbox that will navigate to a link formulated by adding whatever the user types into it to a preset url and opening a new tab to visit it.However, I did not find informations ...
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1answer
163 views

startpage.com requires new permissions: Access browser tabs - what for?

I sometimes use startpage.com, so I installed its Firefox extension. A few days ago, the following information box showed up, informing me that the extension had been updated and needs a new ...
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1answer
506 views

Intercepting input entered into the Firefox developer console?

I am currently in the process of moving my web-dev work from classic IDEs to the web browser console. The console is basically a JavaScript REPL, which is great, but that also means it can only ...
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1answer
68 views

Setting the text input value of the Firefox developer console?

I am currently in the process of moving my web-dev work from classic IDEs to the web browser console. This involves frequent editing of existing source code, which right now means... logging the ...
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2answers
512 views

how to hide Firefox's Add-ons icons like chrome?

I installed some Add-ons for Firefox but there are many icons on the same row as the address bar. I can hardly type web address on Firefox How do I hide some Add-ons, like how I can hide some ...

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