I-Firefox Community Forum

7/7/2026 Last night Firefox on my laptop performed an automatic update to the latest Firefox version. The new Firefox has a very bad setting in about;config .. this new Firefox can only show 1 tab ... it is opening up a new tab on top of the first tab, making it impossible to have more than 1 tab ..

This is going cause problems for thousands of Firefox users .. . how I fix this problem ... I tried setting the add tab settings into about;config to add a new tab to the right of the current tab, but my change made no difference ... how can I fix this problem ... does Firefox have a plan on how to fix for this problem for thousands of Firefox users.. this problem will impact thousands of Firefox users..

I'd like to start adding my customized settings to a user.js file. How can I figure out what the correct code is for each option under Tools|Settings in FF 140.12 ESR

Hi.

I'm having trouble with https://support.mozilla.org/en-US/kb/linux-security-warning?as=u&utm_source=inproduct#firefox:linux:fx140.

It assumes the installation is at "/home/<USER>/bin/firefox/{firefox,firefox-bin,updater}" but mine is "/home/<USER>/.local/share/torbrowser/tbb/x86_64/tor-browser/Browser/firefox.real".

How exactly do I edit the line?

(Latest Ubuntu. I also have Librewolf and Firefox, but didn't see the warning as on Tor.)

Samuel

Greetings,

I'm using & viewing the most updated Firefox browser on a Windows 10 Pro (64 bit), desktop, 24" monitor screen.

With the current updates, the list of bookmarks in my Bookmarks Bar has become very small, skinny & overly spaced, hampering readability.

Though I have learned how to enlarge the bookmarks font size, using the "about:config" & updating the 'layout.css.devPixelsPerPx' attribute, the font still remains very skinny & overly spaced.

Is there an attribute that I can change to alter the Font Style (for example to "Semi-bold") & Spacing of the bookmarks list? If so, please be kind enough to describe the process & I'll give it a go.

If a Firefox Development Team member happens to be reading this post, I'd like to put in a request to add some Bookmarks Bar "FONT EDITING" tools accessible via the browser SETTINGS dialogue, to accommodate readability on ALL the various OS & computer form factors that have proliferated these days.

Thank you, Bruce

Enhanced Tracking Protection is stopping me from accessing many websites which, on other browsers including Firefox for Android, have nothing wrong with them - UK Met Office, forums, webcomics, Patreon... In many places, it's stopping me from connecting to the website altogether, or even logging into desktop app services when I have to use a browser link to log in; the login process simply doesn't resolve. I've tried disabling and removing extensions, changing settings, refreshing the browser and clearing the startup cache, but nothing seems to help. I cannot work out what's wrong, and I cannot disable Enhanced Tracking Protection. I'm having to send this message via TOR browser, because on Firefox, the Mozilla Support site is reduced to just text and links, with no frames or images, and barely navigable. This also means I can't pull Troubleshooting data direct from my Firefox browser for this form, because the form page's display is also broken on Firefox; I may be able to provide troubleshooting data on request, but I will require step-by-step guidance.

I don't know what to do, and I need help.

Hey all,

at shell:startup on windows i will open firefox two times (first for multimedia like tv-stream and maston, second for "working activities" like webmail, office online).

How can i open by file explorer link (like in shell:startup) a new tab (newspaper) everytime in instance "first" even if i was using second at last?

Dear reader,

I wanted to completely removed Firefox because i had some issues. Instead om removing I probably refreshed FF.

Can somebody help with?

1. How to remove old FF data which is placed on my desktop and blocked for removal by admin rights. 2. How to completely remove FF without leaving any data (profiles, extensions)

I have tried to find this answers in the help sections but I was not able to find the solution for my situation.

Thanks in advance. With kind regards,

Ilco

After recent update, I can not browse any addons. The site https://addons.mozilla.org does not open, shows the connection timed out. I uninstalled and reinstalled firefox deleteting all firefox related files. The problem still persists. Other than this all the using browsing I do are all working fine. Just this extensions I cannot browse. When I click the extension icon by default it shows some extensions, I can Install them. The problem is I can not browse them. Even the recomendation tab is also empty.

PS: I am using firefox on manjaro linux.

There going down like flies chief I have no idea how long they'll last or what the root cause is but I have report numbers listed below: bp-6a2f6577-50b4-4503-aa6f-edc0c0250714 7/14/2025, 5:44 AM bp-cca0da19-acc6-4699-b2fd-f78070250714 7/14/2025, 5:44 AM bp-3afd947d-1ab0-4e44-9fee-f4cbb0250714 7/14/2025, 1:05 AM bp-9399b8e9-a389-41bb-9231-a95d50250714 7/14/2025, 3:54 PM bp-8e2c1005-1c7b-49ea-8a50-dbb780250714 7/14/2025, 3:55 PM bp-d270fbee-4e08-4c3b-a6ce-870400250714 7/14/2025, 3:55 PM bp-1cd7a43d-c702-4a15-bb9f-396ef0250714 7/14/2025, 3:56 PM bp-e6cd9efa-9998-4408-872a-713c60250714 7/14/2025, 3:56 PM bp-23709997-e2af-4463-b1ce-b7a4f0250714 7/14/2025, 3:56 PM bp-d46d3db6-876e-4794-a500-f1a590250714 7/14/2025, 3:56 PM bp-723ea32e-8da6-46c0-bbc2-ea5190250714 7/14/2025, 3:56 PM bp-a8860709-a511-44de-9f6a-318560250714 7/14/2025, 3:56 PM bp-fa8c5f4b-5b15-46d1-8df6-ae76f0250714 7/14/2025, 3:56 PM bp-bc81e502-f570-4e59-86b3-e2d720250714 7/14/2025, 3:56 PM bp-ddfeae99-8833-4297-9d0c-010d20250714 7/14/2025, 3:56 PM

Over the past 2-3 months, Outlook, when opened on Firefox, continuously signs me out and forces me to sign in whenever I leave it open for more than a few minutes. Some days this occurs 5 or 6 times and has become very annoying. Even when I choose 'trust this device', or 'keep me signed in', or 'don't ask again for 30 days', it just automatically signs me out. I use 1 desktop and 1 laptop and this problem exists on both.

Also: I have a default font chosen for email composition that the system all of a sudden seemed to not recognize. I can select all content in an email and change it to my default font but it doesn't use it automatically. It either uses Segoe or Calibri depending on which computer I'm using. I have one laptop & 1 desktop. Oddly, if I place my curser down at my signature, which is formatted with my preferred font, the system will then use the correct font. As I'm typing, if I need to correct something, after doing so and trying to type the next word, it refuses to put a space between the where the curser is and the first letter of the next word. I literally have to start a new line by using the enter/return key, type the next word, then use backspace to take it back up to the previous line where it belongs. These are both small details but drive me batty!

I checked with my IT dept and they had me do a test drive on Chrome, which I NEVER use. Sadly, none of these issues exist in that browser, so for the time being I'm forced to use Chrome if I want to avoid the constant need to sign in and the other irritating malfunctions.

Anything you can point to or settings I can change to fix these issues?? Appreciate your assistance! Kayla Bates

Hello,

 I have Firefox 140.0 on Windows 11 23H2.  I just noticed that the Favorites Sidebar text and background are both dark.  The History Sidebar does not have this problem.  Changing either Firefox or Windows color scheme has no effect.  I'm pretty sure this happened with the latest update. 

Thanks

The entire browser was acting extremely slowly, on every website, every start up. It crashed constantly to the point it was unusuable, it was even affecting the performance of the rest of my pc so I reset it and everything I had on the browser disappeared. Bookmarks, passwords, etc. I've tried going through the profile support pages but only the profile made from the reset exists. I had years worth of important bookmarks and passwords that'd I'd like to be able to get back if that's at all possible. (I'll live without them, it'll just suck trying to remember them all again) PC is Acer Aspire 3 Spin 14, Windows 10