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Hi I was using TB 142 without problems. When upgrading to 143 ou 144.B4 I have problems sending mails to all users after some times. Usually the first mails are sent immediatly but after around 10 mails, I have very slow response (varies from 5 sec to more than 1 minute and sometimes timeout). Usually quitting TB solves the problem but this is very annoying. I went back to 140LTS and sems to have no longer this problem. This was tested on many diffrent networks. I am running under Fedora release 42

Thanks

In the older K-9, when one changed the active account, the inbox for the newly selected account would just be shown immediately. No need for any other operations on my part.

Now I have to tap on the inbox to get there. This seems an awful nuisance and offers little to anyone, I suspect.

Is there some way to get the old K-9 behavior?

Thanks!

I have the same original problem as https://support.mozilla.org/en-US/questions/1508740 , and from the same time period, but across 4 of 5 email addresses, with additional problems. All given answers then & now on this website have completely failed me.

I have 4 emails on the same server, which use IMAP, so there is no way for me to adjust any msg retrieval settings, because they don't exist. Surprisingly, one of these 4 emails actually does work in sending & receiving, but I got different error with it, just now! I also have one gmail affected by this original 2 year old problem, as well.

Closing program, restarting computer, and downloading TB updates all do not work. I uninstalled/reinstalled TB, and all of my profiles & emails were surprisingly intact with no deletes (yes, I backed them up in another folder first), and the problem persists upon reinstall of TB, on the exact same emails as the original problem. Antivirus & firewalls are off. Server said it wasn't them. I'm using Windows 11, McAfee antivirus, and the newest TB dld is Eclipse.

There is no distinct alphanumeric error message for the oldest problem, just the usual "Login to server with username failed. Retry/Enter New Password/Cancel." All passwords are correct. None of my passwords are "saved" in the TB program, and I'm having trouble locating where to tell it to do otherwise.

Screencap and copy/paste attempts to grab second error message failed, but it looked like "RETR failed, one message expunged." So far, it's a one-time error, which I can live with. All emails for that ONE working email are fine.

When I attempt to sign into Google, it takes me to a troubleshooting page https://support.google.com/accounts/answer/32050?hl=en asking me to clear cache & cookies, if I'm using Chrome (which I'm not), instead of just a login to retrieve my gmail.

My emails have been sitting on the servers for 2 YEARS and I am at my wits' end - please help!!!

Filters *unreliably* sort the mail into their target files. I have reconstructed the filters from scratch twice, both times with identical, unpredictable results: each filter works properly on the inbox when tested, but each filter only works *sometimes* in the normal course of getting (IMAP) and sorting mail. When getting a batch of mail, some messages are sorted, while others are not. When testing the same filters on the same (still unsorted but already picked up) messages, those same messages are recognized and sorted correctly. The question is: Why are the filters not working reliably during message pickup?

The mail server is running "Debian stable" Dovecot. It seems to work well; I'm not *missing* any messages, but they're not always getting into the right folders. Instead, some messages, and sometimes quite a few messages, may remain in the inbox. I surmise that the problem is in Thunderbird, where somehow the downloading process somehow undermines the sorting process. A queuing issue? A communications-with-Dovecot issue? (The server is in Paris and I'm in North America, but there doesn't seem to be any undue latency that I can detect. The server is not very busy, that's for sure.)

In case it helps: I filter mostly on `DKIM-Signature`, `Authentication-Results`, and `Received` header entries. In a couple of cases, I use `Body`. I'm almost always using "match any" (as opposed to "match all").

I quite often get this message, though it tends not to be a problem later "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox"

One of the solutions seems to be Compact a File. How do I do this?

I have Thunderbird on my Omen 35L on Win 11. Thunderbird CANNOT CONNECT to Comcast to send an email. This was not a problem on Win10. I have done ALL the settings fixes and NOTHING WORKS. Other mail provider accounts send OK (e.g. Site Ground). This is unique to Win 11 and Comcast.

Firefox 146.0.1 (aarch64) macOS 26.2 (25C56) on M2 Pro

Hello.

I'm dealing with a strange issue that began with Firefox 146.0 and continues with 146.0.1. I previously blocked categories I do not care about such as Parenting, Cooking, and others. When doing so, for some reason some of my followed topics including Sports, NFL and NHL no longer appear along with the rest of the topics I've followed. (Please notice only followed sports-related topics disappeared...)

Checking the settings for Firefox Home shows no blocked topics (even those I have explicitly blocked), and checking what I can think to think via about:config shows me nothing I can edit to get my desired topics back.

So, I'm not sure what to edit to get my missing topics back. If they were blocked because of some bug, i cannot see blocked topics in the Firefox Home settings, so I cannot unblock them if that's what would need to be done. Has anyone else experienced this? If so, were you able to resolve it or are you aware of some BugZilla or GitHub issue I can watch for this one?

Any help will be certainly be appreciated. Thank you in advance.

Firefox is now asking for primary password every time it starts, even before any site that required a sign-in. This just started. How can I stop this annoyance, but still keep the primary password for sign-ins?

I´m well trained employee in user support and server administration for more than 30 years now. So long for my skills... I´m the administrator of a Microsoft 365 tenant. A user asked some days age, as he can´t login into his M365E3 account using Thunderbird. I tried this scenario in my private Thunderbird profile and indeed I get an weird dialog box. I can insert my password above the first line, input above the second line is readable in clear text, the checkboxes are selectable, but no button for continue. I have examined https://support.mozilla.org/de/kb/microsoft-oauth-authentifizierung-th..., but have no success. Whats going wrong here and how can I help for debugging? Environment: TB 147.0, disabled extensions, Windows 11 pro german 01-2026 patch M365 account with MFA, (Microsoft authenticator app as primary option)

Hi, I have more than one password for Firefox. One is noted for making changes in thebrowser and use benefits that come with the broswer like the security feature that was called Mozilla Monitor that i understand in now discontinued.

The other password is noted for "just signing in." I called it the "Primary" password.

I don't know the difference anymore.

Also i am trying to sync my passwords to my old firefox. The updates were crashing my computer (Mac 11.7.10) so i dragged the app from the apps folder into the trash. Then i used Chrome to download the Firefox 115 ESR (which for some reason is labeled 140, why???) but now i can't find my passwords from the one i trashed. I am trying to synch the passwords from my other (newer) computer but it doesn't work. Do i need to sign in with the other password? Do i need to quit Firefox for the sync to take? Do i need to reboot the computer?

KR

a few days ago I received a message that i had an upgrade from Firefox. After that I can't find the bookmarks I had saved for paying bills as well as other important items.

Maybe that's at the root of the problem I'm constantly having with my history & bookmarks being unavailable every time Windows updates? The strange thing is that this page shows that Firefox does know I'm using 11.

I've already posed the question I have about resolving that matter. Hope this helps someone figure out the answer. Thanks to whoever tries!

My pc calendar display is blank. I can create new event in Thunderbird on my pc and it is immediately appears in my google calendar on my mobile phone, but does not appear on my Windows 11 PC.

The top two toggles in the "location" area of privacy settings are OFF. Greyed out. The rest are also in the off position and greyed out other than "Notify when apps request location" is toggled on. I accidentally said "yes" when it wanted me to share location. (I just started using Firefox last night). Then it opened my "settings" for my computer on it's own and I closed it out quickly as I was working on something important and I cannot have distractions. I did not mess with any toggles or click anywhere else except the big X in the right upper corner. Since I didn't mean to click yes now it is prompting me quite often, every few minutes, to turn the location service on and automatically opens the settings for my laptop to the page "Privacy & Security > Location. How do I get this Madness to stop?