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I’ve set up Kagi as my default search engine on Firefox for iOS, but every time I open the app, it seems to revert the default search engine to DuckDuckGo. Then I have to set Kagi as default again. It’s a very strange bug. I’m not sure if it only happens when you set a custom search engine as the default.

Until today Oct 14, 2025 I could edit the subject line on my incoming e-mails by right clicking the subject line and use 'edit subject'. As of this morning that option is not available in the context menu that comes up when I right click the subject line for an e-mail in my inbox. anybody have any ideas? I use this function constantly in my business to add the customer name to the subject line for customer searches and if I send a copy to a vendor so all messages pertaining to that customer are easily found.

Hello, How do we enable the javascript in the thunder bird email? From time to time when I get a email it say to view full email ,enable javascript,or enable javascript to veiw email right?

Recently I have noticed that the toolbars I use frequently are hidden. I have searched help for a solution to the problem - I want the toolbars to be always there, not just sometimes - and the advice to fix the problem is old and does not work. Is there a solution to my problem, or do I just have to always toggle "alt" to get a toolbar when I need it?

Thanks for any help!

When I open an email or calendar item the window is really small. I resize the window, but next item I open goes back to being the same small size again. How do I get Thunderbird to persist the window size I would prefer?

For several months, I think, Thunderbird on my PC was failing to receive any of my emails that people, including myself, sent to my mailfence.com email address. The emails to my mailfence.com email address came into my *iphone* just fine; just not into Thunderbird, which is on my PC. They used to come in fine into my PC's Thunderbird app for the last few years.

Turns out, I THINK, the culprit was that I had *thought* I was clicking the old "Get Messages" button, but that button WASN'T EVEN AT THAT SPOT anymore! Instead, I was mistakenly clicking the "Mail" icon, thinking it was the "Get Messages" icon, or at least that it was serving the same purpose as the old Get Messages icon used to give me.

Somehow I just now saw a bunch of emails to my mailfence.com email address come into Thunderbird, from my recent various experiments. Not sure how I did that; maybe clicking the "Mail" icon does in fact serve as a "Get Messages" icon?

Get a load of the attached screengrab, and you'll see my confusion: (1) There is no longer a "Get Messages" button at the upper left. (2) AND, there's no File Edit View bar of tabs at the very top like there used to be! The File Home View you see in this screengrab is from the PAINT app, I believe. I realized this problem by looking up in Thunderbird Support how to get "Get Messages" back and saw a screengrab that had File Edit View, that I then realized I was missing.

Thanks for any help getting me back my File Edit View and my Get Messages button. If you see other problems in this figure please I'd appreciate your letting me know how to fix that, too!

I'm trying to stop Firefox from restoring tabs after I restart my OS. So far, I've done the following:

• Disabled `Startup > Open Previous Windows and Tabs`
• Disabled all extensions
• Confirmed I do not have a `user.js` file
• Set `browser.sessionstore.resume_from_crash` to `false`
• Set `browser.sessionstore.restore_on_demand` to `false`
• Set `browser.sessionstore.resuming_after_os_restart` to `false` (It was already set this way.)
• Set `browser.sessionstore.max_resumed_crashes` to `0`
• Set `privacy.clearOnShutdown.openWindows` to `true`
• Set `browser.sessionstore.max_tabs_undo` to `0`
• Set `browser.sessionstore.max_windows_undo` to `0`

(I've since reverted the last two and the extension changes after they didn't work.)

So far, Firefox will not restore tabs on application restart (manually closing and relaunching) or on crashing (after sending SIGTERM/SIGKILL), but it still restores tabs after restarting the OS (if I allow the OS to kill it during shutdown). I've seen a couple suggestions to disable history completely, but I do occasionally refer to my browsing history, so I'd prefer a less-drastic approach. Ideally, I just want Firefox to treat the first launch after a shutdown as a normal launch and not apply any special behavior. Any help would be much appreciated!

System: Fedora 42 (Workstation Edition) Running Firefox 144.0.2 on Gnome 48.6-1.fc42

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.

background-image: url("file:///C:/Tools/FF/FFbkgnd01.jpg") !important;

Used to work, and does work in the regular version of the desktop app, but no longer works in the beta for desktop 135.0b9, says: "Could not load the image"

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?

Last week my usually reliable 'Thunderbird 115.8.01 on iMac 10.13.6 has suddenly gone haywire.

* In the folder pane, multiple folder duplicates reappearing even after deleting them. (See images) * And when I delete messages, they appear in the trash folder, only to disappear and repeatedly reappear - back into the message INBOX. * Also, after making a change in the Notification section to turn off the notice sound, and although the sound turned off, so did the auto-disappear function. Now I have to manually "close" each and ALL notification notices one-by-one. The new problem is: now the notification option section has disappeared in settings. (No image for this one. Nothing there!) Bug? Or something else?

Please help. P.S. I ran both of my antivirus programs twice. Each over different days and both declared' my system clear and clean.

I'm a security analyst. I would like to get email notifications on security advisories, alerts and vulnerability information regarding Firefox to stay up to date. Please help on how I can get the subscription?

Hello, I am trying to create a deny all & white list only gpo for Firefox extensions.

I am using the gpo; Computer Configuration/Policies/Administrative Templates/Mozilla/Firefox/Extensions/Extension Management

I started out simple using a template which worked.

{ "*": { "blocked_install_message": "Your Company Blocked Message", "installation_mode": "blocked" }, "uBlock0@raymondhill.net": { "installation_mode": "allowed" } }

However, when I tried to add in more allowed extensions it now longer worked and was able to install any extension.

{ "*": { "blocked_install_message": "Your Company Blocked Message", "installation_mode": "blocked" }, "uBlock0@raymondhill.net": { "installation_mode": "allowed" }, "querymoid@kaply.com": { "installation_mode": "allowed" } }

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

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.

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.