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I have been using Thunderbird for ages now with no problem, but I suddenly realised that no recent emails were appearing from my Gmail account. I have tried everything suggested on line to resolve the problem, including uninstalling and reinstalling Thunderbird, and deleting and re-entering my acccount details but neither the IMAP or SMTP servers will connect to Gmail. I have reset all of the server settings on Thunderbird, and have checked that Gmail is IMAP compliant (which, apparently, is is now automatically). I have spent hours trying to sort this out and am just at the point of abandoning Thunderbird completely, but I am loathe to do so if there is a solution. The latest error message i have received is "Unable to log in at server. Probably wrong configuration, username or password" but I don't know what else I can check or change.

When I go to the all trails site, I get a blank page, with only the words, "Please enable JS and disable any ad blocker" I checked my settings, and my ad blocker in Firefox is disabled. I cannot figure out, in my settings, how to verify that my javascript is enabled.

If synchronisation works bidirectional - does that mean that all bookmarks vanish on all added computers when they are erased from one of them? Can and should one define one of the computers as the one from which the installations should be preserved?

Hi Team,

I am having issues logging in to my Firefox account to sync the browser.

"This profile was previously synced to a different account

To keep your data organized and secure, each Firefox profile can only be synced to one account. To sign in using elias@aftc.co, create a new profile."

After downloading and running installer (Thunderbird setup 148.0) from Thunderbird website, Thunderbird opened as usual, showing my three email accounts. The 2 accounts I use for almost everything are both Yahoo accounts (yahoo.co.uk and rocketmail.com). But.. neither of these accounts will work without a yahoo sign-in pop which is pre-filled with an account name (example graphic attachment : thunderbird01red.jpg). 1 example shown but the same thing happens for both yahoo accounts.

The 'Next' button, which I assume will ask for password, does nothing.

I have attempted login via webmail. I enter account name, am asked for password and Yahoo insists on sending me a verification code - to the other yahoo account (the yahoo.co.uk account), which I cannot access! I then attempt to login to the other account to access my pass code and the same thing happens in reverse, telling me that a verification code will be sent to the first account.

Via Thunderbird, which has for years done all this automatically behind the scenes, I can get absolutely nowhere. Via webmail, I am in an 'impossibility loop'. I have cleared cache for each account.

Why won't Thunderbird allow automatic account login, as has been the case since the year dot. These are the 2 accounts around which my entire life is ordered - can somebody please help.

Running Firefox 140.8.0esr (64-bit) on Windows 10 Pro on an HP laptop. The feature/problem described works properly with Chrome and Edge. The problem occurs when accessing the following article:

  https://www.comsoc.org/publications/ctn/turning-fiber-sensing-system-magic-fiber-optics-sensing

If the window is set wide enough, there is a sidebar displaying, "Share this content in X". If the screen is squeezed down (i.e. drag the right margin to the left) far enough, the sidebar will disappear. That feature is handled properly, but as the window width is increased and the sidebar appears, the main body of text does not wrap properly. It appears that Firefox is not compensating for the width of the sidebar.

 NOTE: As I am not a HTML expert, my subject line referencing a particular HTML class could be misleading.

In February this year I started having an issue with reading pdf formatted statements from my bank' (bank and personal information removed). Initially I thought it was some change at the bank so I sent the letter below to my bank.

Further experimenting with Microsoft Edge and Firefox leads me to believe the issue may be with recent changes to firefox. The attached jpg file shows the problem, though not a solution.

I would be curious to know if there is some (new) setting in Firefox to correct the problem.

Text of letter to bank:

re: document access on site

You have evidently made some changes in your account display and I have to tell you there are issues with it.

Previously the account document came up as PDF. Today I accessed the current statement and immediately noticed the change in display format.

I usually do two things here. First I print the document. The print button worked as expected. Next I SAVE a copy for future reference. The download button DID NOT WORK.

I had to use the print save to file function. This is where I found the problem. I saw this when I checked my print queue as well. Instead of PDF the document is now PDF.js viewer.

I have to ask why you went to java script when the original PDF format worked properly every time?

On the plus side, my pdf viewer still reads the saved file. It is the unnecessary print to file step to which I object.

I am not at all happy with this change and would encourage you to return to the previous process. Since it was NOT BROKE I am at a lost to understand WHY YOU FIXED IT.

I turned on Firefox this morning and its all changed I have no bookmarks no menu and no search bar I hate this new system Why cant i go back to the previous version ???

При нажатии на ссылки некоторых сайтов выходит страница с адресом, но содержимое пустое либо белый экран окна, либо черный, в зависимости от сайта, ничего не смогла понять, другие сайты открываются отлично. Например notion открывает черной страницей, мой газ https://мойгаз.смородина.онлайн/ открывает белым, mail.ru открывает но дальше все письма внутри начинает открывать чистыми вкладками. И это происходит не зависимо от того включен VPN или нет, загружает одинаково, произошло сегодня после перезагрузки компьютера. Сайты рабочие, проверено с этого же компьютера но другими браузерами. Как решить проблему? Это малая часть сайтов которые не работают.

With dailyexpress.co.uk using Firefox there are two pop ups. One is breaking news on each page using right links and the other is a subscribe to read any of the site, which is recent but prevents reading the site. This does not happen using Microsoft Edge.

the clear option on search bar is not working i troubleshoot , restart and even reinstall the Firefox but it is not working . All other options like microphone camera all are working except clear option

I just switched to Floorp from Chrome. When I try to print a shipping label with my DYMO 450 labelwriter, I cannot get the label to fit properly as I can with Chrome. It is an issue with the print dialog in Floorp. It does not have the "fit to paper" selection in scale section of the dialog. This makes the label print not near as well as in Chrome. I will be switching back to Chrome unless this can be addressed. See the 2 screenshots attached to see the issue.

Thunderbird 148.0 moved trash folder from top group in folders pane to alphabetical order in lower group. Reopening Thunbird didn't help. How to get it back into place? Thanks!

Windows 2026-02 Preview Update (KB5077241) causes Acer laptop to crash when firefox opens when computer is started. Only on this laptop, other computers are unaffected. Firefox is the newest version and like mentioned, all other computers run the same security programs and vpn. The windows update needed to be uninstalled on the Acer laptop for it to operate correctly.

Initually I was having issues where I couldn't get the print menu to load up (forever stuck trying to load the preview), however since then it has progressed to downloads refusing to download and the hamburger menu in the menu bar doesn't react when left clicked at all.

I am trying to enter my Thunderbird account to review my emails, however, everytime I click on the Thunder bird icon nothing happens. Please help me to regain my ability to open Thunderbird. I am falling wat behind in my work.

Majic