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I need to be able to hide the Extensions button from the toolbar. Is there a way to do that outside of the user.js or prefs.js? Preferably I'd like to do this though the policies.json file though I could not find any options for this.

the settings ExtessionSettings does not show up to be able to modify even tho it is on the ADMX file (5.11)? Should I use the older Extensions policies? I want to install and pin an extension from the store.

Thanks to the help received here and in the Reddit group I've been able to transfer almost all of my old colour and layout tweaks to a new intallation of Firefox (v133) on a new PC (running Windows 10). There's one thing that I haven't succeeded with though: I'd like to change the colour of the text in a tab when that tab becomes the active one.

This is the coding I'm using to change the tab's background colour when it's selected:

1. TabsToolbar .tab-background[selected]{

background: white !important; }

This works perfectly. But when I tried adding the line

color: black !important;

It had no effect. I'd be grateful for any thoughts. Many thanks.

The font size in "Manage Bookmarks" is way too large, both in the sections list menu on the left and the list of bookmarks. I checked my userChrome.css file as well as the layout.css.devPixelsPerPx entry in about:config and there's nothing there to explain why only the "Manage Bookmarks" text is so large.

It's possible I changed a setting somewhere that's causing this. But I'm stumped re: what setting might be controlling the font size in only that UI. All other Firefox text sizes are good.

Thanks to anyone who knows where I should be looking

Firefox 134.0.1 (64-bit) Windows 10

Hi folks

I have a particularly infuriating problem. A few weeks back, Firefox stopped displaying my usernames and passwords whenever I wanted to log into a site. This coincided with my installing BitDefender, although I don't know why.

Through googling I eventually realised I could go into about:config to fix this. signon.rememberSignons displays as false, when I turn it to true it fixes the issue.

But here is the problem I can't solve. Everytime I restart firefox or my PC / Mac (I am using both, with a syncronised account on both windows and MacOS) it sets signon.rememberSignons to false AGAIN. Which means every single time I browse I have to go into about:config and fix this. Maddening.

Please can you help?

I believe that version 145.0, newly installed on the 9th December, 2025 was showing server folders correctly; the server folder name matched the client folder name.

After upgrading to 146.0 on the 10th December, the server folder names for some folders are displaying with different client folder names.

The IMAP account has both "spam" and "junk" folders, Thunderbird is now displaying both as "Spam", you can only determine which folder is which by showing folder properties. It appears to users that there are two "Spam" folders now and not the two distinct folders with their own names.

Similar behaviour is happening for "Sent" and "Sent Messages" folders, both now display as "Sent".

These changes are confusing, the client sees two "Spam" folders and two "Sent" folders instead of the original proper server folder names.

Why has the display name for these folders changed?

How can I get TB to display the real underlying folder names?

Hello,

I wanted to customize my Firefox new tab with a local HTML file, such as "/path/to/my/index.html". It was possible to use this workaround: https://github.com/Jangsoodlor/Firefox-New-Tab-Config/tree/main https://github.com/Jangsoodlor/Firefox-New-Tab-Config/tree/main

Which implied a configuration file (sometimes named "autoconfig.cfg", "firefox.cfg", "local-settings.cfg" depending on the guide since the name is arbitrary) with javascript code. In the new Firefox 136, this code fails to execute due to a new API being used.

If you want to customize your new tab, follow the previous guide, but on the configuration file write this code instead:

// My new tab
try {
  const ff = {};
  ChromeUtils.defineESModuleGetters(ff, {AboutNewTab: "resource:///modules/AboutNewTab.sys.mjs"});
  ff.AboutNewTab.newTabURL = 'file:///path/to/my/index.html';
} catch (e) {ChromeUtils.reportError(e);}

Note that the file must start with a comment

Adapting the "/path/to/my/index.html" to your needs.

Thanks to @mkaply (github) on this thread https://github.com/mozilla/policy-templates/discussions/1190 for the new API method.

I post this here in case someone has the same issue, because is quite recent and hard to find on the internet.

Hello team,

While drafting this message, If i want to put the next word

on another line, there is a default space that gets created. This is quite annoying.

So I draft the mail on Notepad++ and no more line breaks like we see here. Is that something I can do in Thunderbird do in setttings? I am not able to find how?

Regards, Karan

Note: I have attached a snaoshot drafting the same note as above on the Thunderbird client to show my issue.

Good day.

I have created a custom Search Engine via a GPO.

The search engine is added to Firefox without issue. However, when a user enters in a search with a space, Firefox replaces the space with a "plus" instead of a %20. The search engine does not know how to interpret a "plus," so the search engine returns 'no results found.' I use the same search string in a Chrome GPO, and it works as Chrome replaces a space with a %20. Is there a way I can tweak the Search engine GPO to use %20 instead of a "plus" for a space?

Thanks.

Peter

Hello.

I have a specific inbox from which I would like to ignore notifications. I have downloaded the NTFNTF extension, which helps with notifications, but I still see the little red bubble with the total number of unread e-mails next to the application icon (I'm on macOS, see the supposedly-attached screenshot). Is there a way to have this indicator only show unread e-mails from a specific inbox, even if the solution requires installing an extension? Thank you in advance.

Hello

Is there a way to have the TAB function in an email message body with an option to produce a string of dots, instead of just a blank space? I would particularly love to have it line up subsequent rows on the accounting decimal point when the $ sign is used.

EG with a list of expenditures:

Home Depot .....................$50.00 Office Depot ...................$200.00 Starbucks...........................$37.50

Hope this makes sense! thanks Baz

Hello, I usually redirect incoming email automatically to custom local subfolders (POP account).

Today I noticed that, since october 2024, my Message Filters started copying emails, instead of moving them, despite the still-correct instruction. So I'm left with a bunch of duplicates.

Does anyone know how to fix this bug?

When I click on a folder with multiple messages, each of which has a thread with multiple messages, all of the threads are automatically expanded. If I collapse each message thread, leave that folder, then return to that folder, all of the message threads are again fully expanded.

Is there a way to stop this automatic thread expansion each time a folder is opened?

(This is embarrassing.)

The first screenshot shows how I've been viewing messages.

Today I tried some of the View option.

Now I have what shows in the second screenshot.

I've tried every View combination, but I can't get back to the way I had it! 😣

Would appreciate some help, please.

I've imported/exported everything I could from a Win10 to a Win11 one. I then went to the toolbars under "view" and made sure they were all checked. Next, I clicked on "customize" and selected (single click) what I wanted to add to my toolbars in the mail window. The "save option" was greyed out. How do I save these to my toolbars?