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1. Thunderbird was not my default mail client in Windows. When I tried to select it as default it did not appear in Windows' list of applications.

2. I tried to find the my profile and it showed where it was - but that directory did not exist. I finally was able to make a new profile and the directory showed up - but then the default-esr profile disappeared and now I can't find it and neither can Thunderbird. Is there a way to find where it went? I don't believe I delete it, it just went away. This is the message I get:

Your Thunderbird profile cannot be loaded. It may be missing or inaccessible

Hi,

I'm on a fresh Windows and the CPU usage is waaaaay too big. When TB is out of focus, it uses about 10% of my CPU. This can go up to 15% when the window is active. It's not doing anything, not downloading or compacting or anything.

Thanks !

For the past few months, videos on YouTube haven't been playing properly. They load just fine and there's no issues with the auto, but once the video starts playing it will sometimes be zoomed into the top left corner, making it impossible to properly see what's going on.

This happens with music videos too, both official and lyrical. It will be zoomed in close to the top left corner and just barely catches what's going on in the video. Sometimes, video do play like they're supposed to, but for the most part, they'll be zoomed in as soon as I hit play.

I've been using Thunderbird for many years, and its up to date. I've had more and more problems with choppy response times lately. It "freezes" for short periods where the interface stops responding for half a minute, or a minute or so before I can do anything. It always comes back (never crashes, shuts down). Today was some of the worst where it was minutes before I could start using it.

My junk and trash folders are empty, and I've done a compression and run the cleanup operation on a bunch of folders. My Inbox is empty. I only have 2 pop accounts. Its not when its retrieving or sending email though.

Hi, tbird 128.3.0 esr 64b w11p. A prob new to me. Only for MS outlook mail (aka office365 email, but no ofc365 on my laptop, just the email in tbird). -in unified folder view, my MS mail acct (it still has the "hotmail.com" address, but works), is not present -- that's the problem. A workaround is that I can choose both "unified" and "all" views together -- but while the MS mail acct now appears in the folder pane at the top, as well as in its own "place" at the "accounts" area below, that MS mail acct not longer has its messages appearing in the "message list" pane. I have to go to MS Mail's own place below, in the folder pane (as stated above),to see its msgs. in msg pane.

 I could use the "all" view, but it's not as nice & I never have had to choose that before this prob.

- I did run "repair folder" for MS mail's own inbox (again, below, in its own place below, in folder pane, accts). And I restarted t-bird.No change in behavior, unified view does NOT list my hotmail emails.

I have used & am comfortable w/config ed, but only when I have the proper instructions you may post in your potential reply (I am not a coder).

Please advise, thank you.

I get the server not found error on almost anything.

Hmm. We’re having trouble finding that site. We can’t connect to the server at [literally almost any site] If you entered the right address, you can:

   Try again later
   Check your network connection
   Check that Firefox has permission to access the web (you might be connected but behind a firewall)

The site usually loads after I wait like 2-3 mins before reloading the site, or I force reload it around 7 times, but I cannot find a way to make the issue go away. I have refreshed Firefox, I have uninstalled and reinstalled it fresh, I have opened Firefox in Troubleshooting mode and the issue persists. I am at the end of my wits. Someone please give me something else to try.

In the last few days, the common Cloudflare widget required to login to many web sites has abruptly stopped functioning in my browser. I'm trying to diagnose what's caused it. I'd appreciate any suggestions or advice.

I noticed the issue on nexusmods.com, but I've confirmed it's a universal problem on ANY site that uses Cloudflare protection. I've continued to use Nexus as my test case.

Observed behavior: 1) The Cloudflare widget loads 2) It displays a checkbox noted, "verify you are human." 3) I click the checkbox. 4) It immediately begins "thinking" (spinny circle and "verifying...") for about nine seconds. There is an "error" message that appears during this, but no details are offered (see screenshot) 5) The widget reloads. 6) Go to step 2

This is an infinite loop.

Fixes attempted: - Disabling all extensions (uBlock, NoScript, Privacy Badger, Decentraleyes) - Clearing cache - Updating to the most recent FF build - Accessing in a private window - Changing DNS settings from Cloudflare to NextDNS - Disabling DNS over HTTPS altogether - Disabling HTTPS-only mode

I have been having much trouble with Thunderbird. The latest problem is with the Sent folder. When I try to Compact Folders I get the message "The folder 'Sent on Local' could not be compacted because writing to folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again."

I have plenty of disk space and have Full Control. I tried creating a temporary folder and moving all the Sent messages to it, so that Sent had zero messages. I still got the same message. The file listing showed Sent to have a size of 182 MB even though it didn't contain any messages. I've tried deleting sent.msf to force Thunderbird to recreate the index - didn't work. I tried using Repair Folder. That worked, but when I tried Compacting Folders again it found another folder with the same problem. I fixed that one and then it said the Sent folder was bad once again. I'm going around in circles!

I've deleted and recreated scores of .msf files for various reasons, trying to get Thunderbird to work without errors, but as soon as I get one problem fixed, another one crops up. I'd conclude that it's my computer, except that I'm not having any problems with other programs.

Any thoughts on this particular problem or Thunderbird problems in general? Thanks.

I cannot use Firefox or Thunderbird I keep getting an error code: PR_CONNECT_RESET_ERROR The problem started straight after the latest update a few days ago.

I have cleared the cache and cookies I turned off the addons and extensions I shut down the internet security I changed the proxy settings to "no proxy" I even changed cert9 to ccert9 and had firefox generate a new cert9

Nothing has worked.

HELP!

Why does hitting my Home button open another tab? It's irritating and unnecessary. How do I make it stop?

For that matter, Why can't I open a new tab with my home page already open? I want Duckduckgo. You are bullying me into a blank page or a Firefox page. I used to have a choice.

Guten Tag, ich arbeite mit Thunderbird auf Linux Mint. Jeweils in den aktuellsten Versionen: Linux Mint 22.1 Cinnamon Thunderbird 128.11.0esr (64-Bit)

Auf meinem bisherigen Rechner begann Thunderbird mit dem letzten Upgrade von Linux Mint langsamer zu laufen. Da ich mir nicht anders zu helfen wusste, habe ich in einen neuen Computer investiert. Obwohl der Rechner jetzt deutlich performanter sein sollte, hängt Thunderbird mindestens genauso wie vorher. Zum Teil ruft Thunderbird auf dem neuen Rechner auch keine neuen E-Mails mehr ab. Ein Neustart korrigiert das zwar wieder, aber beim nächsten Start kann es dann wieder genauso sein.

Alles, was man in den Foren findet, um Thunderbird schneller zu machen, habe ich erledigt. Cache gelöscht, im abgesicherten Modus gestartet (da ist Thunderbird genauso langsam). Auch verschieben von Nachrichten in Archivordner brachte keine wirkliche Besserung.

Ich nutze Thunderbird für 7 Kalender (zum Teil lokal) und 10 E-Mail-Adressen bei unterschiedlichen Anbietern.

Als Add-on habe ich DKIM Verifyer installiert und aktiv.

Ehrlich gesagt, bin ich inzwischen ziemlich verzweifelt, was das Thema angeht. Witzigerweise lassen sich die Entwicklerwerkzeuge nicht aufrufen. Keine Ahnung, ob das vielleicht ein Indiz für den Fehler sein könnte.

Hat jemand eine Idee? Oder noch Fragen?

Herzlichen Dank.

Firefox has stopped obeying target="_blank"

Started a month or so ago.

Take a look at Firefox target="_blank" problem for details.

There is not a topic in the dropdown list that remotely addresses this issue so I just selected Performance and Connectivity for the hell of it.

After yesterday's update, I'm not able to access files in Google Drive using Firefox on Windows. They're greyed out, and when I try to open one, a pop up informs me "This file can't be opened because you're offline." I'm certainly online, and it works on Chrome (ugh). Anyone else experiencing this?

I am running Thunderbird 128 (any version) on a Surface Pro 9 running Windows 11. After sleep/hibernate or going into energy-saving mode, TB hangs for a period of minutes. Eventually it comes back, but it can take 5-10 minutes.

I do not have this problem with TB 115 on the same machine, or TB 128 on other machines (e.g. running Windows 10 or Ubuntu). TB 115 on the same machine can take a few seconds to come back (longer than on my other machines), but that s OK.

I have the same expereince whether or not I am troubleshoot mode. I have created a new profile with no add-ons (and less acounts) and I have the same problem. I was wondering if it is something to do with the fact that I have 8000 folders, and somehow TB is hanging while it checks all the folders. That account is a fastmail IMAP connection, but I have experienced similar on a backup Microsoft Exchange account (again an IMAP connection) with similar number of folders.

Any help would be appreciated.

I get PR_END_OF_FILE_ERROR when trying to load certain websites. I don't use any proxy or VPN, I tried disabling DoH. Also sometimes i get 403 forbidden cloudflare.

When I have thunderbird open and click on an email so the email gets big and is off to the right so I can look at it, then I have to click on the arrow at the top left to get the top bar to scroll clear back so I can get to the inbox again. Got to be an easier way. Help pls. Thanks!

Hello,

I use Thunderbird 128.5.2esr with xubuntu 24.04.

All of a sudden (I haven't changed anything) thunderbird hangs completely after a few minutes running. The process does not react at all, I have to kill it. Thunderbird process is then stuck on 100% load.

Already testet (with no success):

• Troubleshooting Mode with deactivated Addons
• Disabled Global Indexing (with deleting global-messages-db.sqlite file)
• Waiting for 20min (in case thread/process is running a long time)
• Reboot OS

I have no idea what the issue is. Does anyone have ideas? Thx, Hugo

Some Firefox option is adblocking some links in Publishers Clearing House emails. The same emails work OK in Safari. There are no adblockers (now or ever installed) on this Mac. It's not the end of the world for me but it should be fixed for possible future use.