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I get a message saying "The certificate is invalid." And I am currently unable to receive emails. When I open the server settings screen, it says "The certificate exception already exists."

On my wifes PC Firefox appears to be doing random things. First the screen turned pink, then the taskbar icon has a gear-wheel overlaying it, and she is unable to do anything, like logging into zoom. Google searches work but clicking on any link goes nowhere and just sits. Is there a way of returning to it's previous boring but appreciated habit of just working, without uninstalling and re-installing from scratch please? thanks (she is currently using our fallback laptop in her office so I can't access her pc for an hour or so.)

Feedback Content

I really love Firefox’s new Split View feature. The Alt + Click shortcut to create vertical split pages works perfectly and greatly improves my multitasking workflow for side-by-side tab comparison. However, there is currently no native keyboard shortcut to cancel / exit Split View and separate tabs without closing either page. To undo split view, users have to rely entirely on mouse operations: right-click tabs or click the divider menu. This breaks keyboard-first browsing efficiency and creates unnecessary extra clicks every time I finish comparing pages.

Feature Request

Please add a dedicated built-in shortcut to quickly separate tabs and close Split View. A simple key like Esc or a custom combination such as Ctrl+Shift+Alt+X or something would be ideal, matching the convenient Alt+Click way to trigger split view.

Sometimes I got a problem with Gmail where I get the error "Too many simultaneous connections", both desktop and Android. I found that Gmail servers support 15 connections. I could reduce the number of connections for desktop in the config editor, but I would like how to do that in the Android app. Some times it creates a lot of connections, and I think the numbers stack up together with dead connection when I reboot my router and get a new IP, so I'm wondering how to set to get just one or two simultaneous connections on Android.

I have been using Thunderbird for years. Suddenly, a couple of days ago, the sent and trash folders no longer show the emails in them. When I use Roundcube online, these files show up there as normal.

I have done considerable research online to solve this problem to no avail. Using AI, they suggest a number of things that I have tried, without solving the problem. Apparently, this is somewhat common. I finally got to deleting the send.msf and trash .msf. This did nothing to solve the problem.

This is very frustrating. What can I try next? I am using Win 11 and Version 152.

Carl

Hi Team,

Greetings!

I need your assistance regarding password protection for the Thunderbird email client.

I have configured an IMAP account in Thunderbird and enabled the **Primary Password** feature. However, if I cancel or skip the password prompt during startup, Thunderbird still opens successfully, and all previously synchronized email messages in the Inbox remain accessible. The user is also able to view the mailbox and access email content.

My requirement is that "Thunderbird should not open, display any email messages or allow Send/Receive operations unless the correct password is entered".

Could you please advise if this functionality is supported natively or suggest the recommended approach to achieve this?

Looking forward to your guidance.

Regards, Ps Cheema

Sometimes I am using the youtube app to watch something on a TV, but want to quickly look up a video for someone else on my browser at the same time. I have my settings to "always ask" me whether or not to open links in their native app or stay in FireFox. But recently the setting has not been sticking. I've had to reset the settings at least three times today. What's going on? Am I doing something wrong in settings?

I need to enable Javascript. This problem began with the latest update 152.02. Last Pass needs it. So does ID me. I have tried about:config and javascript.enabled (true). Apparently it is not so. The computer is an HP Pro 3500 series MP Windows 10. I hope someone can help. Thanks.

6/21/26 This morning I could not open my FireFox browser, unless i created a Profile. I was forced to use the Profiles Wizard to create a Profiles; when i finished all my Bookmarks had disappeared. Which was a great shock, had lots of Bookmarks in Bookmarks Toolbar, Bookmarks Menu, & Other Bookmarks, I need to get those Bookmarks back !! >>More info: I had Hibernated my Dell 15 laptop overnight. This morning when I turned on the laptop, I got the above message that I had to create a Profile, which I did, which made all my bookmarks to DISAPPEAR !! I need them back!

EMAIL: [edited email from community support forum]

Hi

I have a problem with Thunderbird which might be a bit niche but here goes...

The first attempt at sending an email fails as TLS Record Layer v1 is used, the mail server sees this and hard resets the connection so sending halts. See attached Wireshark trace screenshot "Failed".

If I retry the send again Thunderbird uses TLS Record Layer v1.3 and the email goes out ok. See attached Wireshark trace screenshot "Success".

If I send another message immediately no problem but if I wait 20-30 minutes the above cycle happens again.

I have set the minimum TLS version in the config to 1.3 (option 4) and restarted Thunderbird but this has not changed anything.

Any ideas how I can fix this? It's a pain because automated replies don't work.

I find that my desktop browser firefox is very slow or doesn't work at all on a lot of websites like amazon or fortnine.

My internet connection and computer are not the issue: 270Mbps (wired connection) Processor AMD Ryzen 7 9800X3D 8-Core Processor (4.70 GHz) Installed RAM 32.0 GB (31.1 GB usable) Graphics card NVIDIA GeForce RTX 4070 Ti SUPER (16 GB) Storage 3.58 TB of 10.92 TB used System type 64-bit operating system, x64-based processor (Windows 11)

My old PC and my mobile phone runs these website fine.

Sometimes the website will work for a moment, but stop and just load for ever after I open a new tab or clink a link. My task manager doesn't show any ethernet usage despite the tabs indicating they are trying to load. Refreshing the tabs does nothing and no matter how long I leave them they don't load. All my drivers, OS and programs are up to date. I have disabled my enhanced tracking protection and I don't have any adblockers. I have tried using the CMD "ipconfig -renew" and using ccleaner to clear out my cookies and cache but, nothing seems to have any lasting effect.

I am losing my mind trying to fix this. Why can I not browse the internet on my PC?

Any help on this would be amazing and much appreciated.

Sincerely, Calvin

bold texti have a thunderbird profile on exterior drive I have installed linux mint on my PC but cannot locate the profile to use my old TB profile -either by replacing it or renaming the old profile for the linux one

I have a fresh install of Thunderbird from yesterday. Never was on this machine before. Setting up 2 mail accounts worked well. I can select multiple messages using either ctrl+click to select individual messages or shift+click to select a range of messages. They all get highlighted as one would expect, but when I drag them to another folder, or choose from the right-click options like move or copy or archive, this action is performed only for the first message that I clicked. I am sure this did work before and I have no idea what I might have changed so that it does not work anymore. I transfered a lot of messages from one account to the other without problems. I changed archive options, installed the AutoArchive addon, changed folder icon colours, ... Can't remeber everything, sorry. On a side-note, AutoArchive is also only archiving one single message from every folder, so the underlying mechanism is the same.

I have used 4 rows of site icons on my home page for years. (Linux FF since 2013, various distros.)

After an update, they became tiny AND so close to the bottom that a zoom of even 110 percent was unacceptable. (I prefer 100 percent.) 100 cut off the labels at the bottom.

I deleted my search bar from homepage yesterday, and had already deleted top stories and weather years ago.

Several searches over the last few days have done nothing.

Screenshot of zoom at 110 and straight 100.