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"To help us assist you more effectively, please provide as much detail as possible about the issue you're experiencing. For example, instead of saying 'The app is broken,' a more helpful description would be: 'Videos on YouTube are always choppy when I play them.' The more specific you can be, the faster we can diagnose and resolve the problem!"

I need larger fonts when I compose my emails. They are teeny tiny and I have a very difficult time seeing them. I don't think that it's appropriate that I have to Zoom every time I compose an email. There should be a way to make my Body Text size permanent on my screen whenever I want to compose an email.

What might that way be? jimerie@yahoo.com a contributor

I've added https://x.com as an exception site but it is still blocked.

https://x.com/mozilla doesn't work either

Error message on the page:

"Something went wrong, but don’t fret — let’s give it another shot.

⚠️ Firefox’s Enhanced Tracking Protection (Strict Mode) is known to cause issues on x.com"

After 2 days it used to finally load without my doing anything, but not now. I never loads using Firefox.

https://x.com is added as an exception, but obviously ignored.

Tried You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

   hold down the Shift key and left-click the Reload button   

NOPE

Tried: Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings), click the padlock icon (Clear cookies and site data) for the domain in the selected tab.

"Remove the Cookies" for websites that cause problems:

   Settings -> Privacy & Security
   Cookies and Site Data: "Manage Data" 

"Clear the Cache":

   Settings -> Privacy & Security
   Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear 

   https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox
   https://support.mozilla.org/en-US/kb/how-clear-firefox-cache 

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

   switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
   do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window 

   https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
   https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems 

NOPE - lost all my bookmarks, extensions, settings - not going there again thank you

as for:

You can check for issues with Enhanced Tracking Protection. Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

   click the shield icon for more detail and possibly disable the protection 

the sheild has a slash thru it saying "enhanced tracking is off for this site" when i put my mouse over it.

I have a new Thunderbird profile, fixing the many problems with the old one, ably assisted on the MozillaZine Tb forum. One matter not really helped, and there is, of course, too much wrong information on-line.

My question: How do I properly copy the filters from the old profile to the new one? I did a search here before posting, but found no answers.

I'm currently using FF 134.0.2 on a Mac running Sonoma 14.6.1. I'm unable to use the Find shortcut (⌘ + f), but I am able to use other shortcuts in Sheets: ⌘ + c, ⌘ + v, ⌘ + Option + m. That shortcut operates as expected on other sites, opening the Find pop-up at the bottom of the browser. It's not working within Sheets to search a spreadsheet or at the browser-level when on a Sheets tab.

Any idea why that one shortcut isn't working?

Hi I would like about some issue .I use the latest Firefox ESR 115.19.0 for windows 8 . But I have problem see this website .Website show my only Big icon.Screenshot .

https://oferty.praca.gov.pl/portal/strona-glowna

Also I can not download Firefox from your website .Websites do not works ?

https://www.mozilla.org/en-US/firefox/115.19.0/releasenotes/

response 404 (backend NotFound), service rules for the path non-existent

HELP !!!!!!!

Bonjour est il possible q un développeur ai pensé à un manière de sauvegarder les comptes paramétrés dans Thunderbird ? et ne me parler pas du dossier profil puisque d une version a l'autre cela ne fonctionne plus!

(je viens d en faire les frais !)

Hello, is it possible that a developer has thought of a way to save accounts set up in Thunderbird? And don't even get me started on the profile folder, because from one version to the next it doesn't work (I've just had to pay the price!).

merci de votre aide thank you for your help

As explained in the title. On my Galaxy A15, i tested the browser version of Reddit, Youtube, Behance, Instagram and even 4chan. All give the videos as corrupted or stuck on loading.

I already tried cleaning Cookies and site data, the history, already tried disabling all the add-ons, already checked for updates and reinstalling the app. I tested the same websites listed above on Opera and they worked perfectly. Please tell me if there is anything else i should try

In the last 24 hours all messages in the "Inbox" (new and old) no longer have a "From" email address and default to my email address, at the bottom of the screen is the following message "A unique identity matching the From address was not found. The message will be sent using the current From field and settings from identity Marcus Relton <my email address>". These emails once opened continue to be "unread", the option to typical options of a new email such as; delete are not available and they appear as if drafts. This is only occurring in the "Inbox", if mail is moved to another folder within the server folders or local folders the email appears and functions are normal. I read the following thread https://support.mozilla.org/en-US/questions/1457302, which only references updating the Inbox Flag Properties, however I do not have this option. See images of emails and properties for reference. (I have redacted my email address)

OS is Windows 11 Thunderbird is up to date as well. I have made no changes in the last 24 hours with the exception of adding a new "Tag" for email identification.

I would appreciate any help. Thanks Kristen P

I have tried to synchronize my A8 across devices, but not having any luck.

I have signed out, and paired numerous times, but now it is saying it has never sync'ed.

All other devices are working fine.

The crashes are happening daily, and lately more than once a day. I'm using Thunderbird 128.6.0esr (64 bit) on a desktop PC running Xubuntu 24.04.1 LTS. There are about a dozen accounts that get mail automatically from POP servers. The crashes happen when TB is running in the background, or on another dessktop, or minimized. I'm using a new profile created a few weeks ago because the old profile folder had grown very large. This problem did not occur with the old profile.

Here are the most recent crash report IDs: bp-ee9dfb2e-52e0-40b1-a26e-1de2a0250122 46 minutes ago bp-89c99656-b58a-47fc-a2be-c40c50250121 8 hours ago bp-90c851b2-981f-4e3c-b8f3-96ecd0250121 1 day ago bp-1dd4e625-0aa7-4c8e-9ab4-2cdfa0250120 2 days ago

[Note: I characterized this question as an "Installation and updates" issue (even though it is not per se about initial installation or updates) because moving a profile involves installation issues.]

Recently I moved my TB profile, for the second time in the past few months. This time I paid closer attention, and noted several things of interest (that may touch on some questions that remain undiagnosed in this forum):

1. TB took longer to start up, as it could find none of the folders cached in folderCache.json, so rebuilt the cache from the new profile location before starting. (I only learned about this from the next effect.)
2. The "Move to" "Recent" folders list was empty; this cached list only gets rebuilt from use (that is, from moving messages manually (not via filter) to destination folders). This effect led me to folderCache.json- and also may suggest why the OP in that question could not get resolution of his problem.
3. The newly cached folderCache.json was 528 KB, compared to 365 KB at the old location -- and that, in turn, was 170 KB larger than the 195 KB size of folderCache.json at the original location. So each time the cache is rebuilt it grows perhaps 150~200 KB (size depending on the many-times-repeated path length).

What causes the file growth? Because each time it is rebuilt, TB checks through all of the cached folder paths, apparently guided by the mailboxes listed in folderTree.json (see image below). [I think TB just checks each path to see whether it is compatible with the current profile location. If yes, the path is cached for runtime; if no, the path is repopulated from the current profile location (which takes most of the startup time).] But TB never deletes the no-longer-valid paths; it just appends to what was already in the file, so that the list of cached folder paths just grows (thereby increasing TB's startup time, every time). The best way to get rid of the old stuff is just to delete folderCache.json and let it rebuild on the next startup, to reduce the time needed for subsequent starts.

Finally, my questions: In addition to folderCache.json (different timestamp in each profile, of course), there are four files which are the same in all profiles: folderCache-x.json, x={1,2,3,4} (see screenshot). These are apparently from actions prior to the profile relocations, as they are simply copied from one profile to the next, unrelated to changes in folderCache.json. Can someone tell me:

1. What actions cause the creation of folderCache-x.json files?
2. Why folderCache.json merely appends new folder paths without deleting the old ones?
3. Why folder paths are specified explicitly (fully qualified) rather than relative to the profile path?

Thanks for any pointers.

Using the french version of Thunderbird 128.5.2esr (64 bits), I set, in the settings, the following options for one of my accounts (see picture): "Delete messages older than X days" "Always keep starred messages"

However, just after this setting change, I closed and reopend Thunderbird, and all messages older than X days are still there.

What should I do?

On January 21st 2025 I changed my Spectrum account password. Almost immediately Thunderbird could not log into the spectrum maintained "mail.twc.com" server. When I called Spectrum support I was told the old Spectrum use of separate passwords for SMTP and IMAP was changed to use the same password as the spectrum web page which is now the same for all spectrum logins, a "one password to rule them all" scheme in November 2024. I changed the passwords in Thunderbird for IMAP and SMTP, but it still will not connect. If I do an auto populate attempt, the server actually responds with the correct setting so I know I am reaching the server. After five days trying to resolve the issue with Spectrum I was told this is a know issue with Thunderbird and it is not the server but the third party application. It is bad enough they reconfigure things like this without disclosing it. It baffles me that the changes they claim were made in November 2024 only make themselves known when the service stops working nearly three months after the change and only when I changed the web site password. Anyone know how to solve this? Thank you so much in advance.