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When using any Microsoft 365 product on the browser I keep getting a prompt to "Please sign in" although I am already signed in. I can click the Sign in button and a about:blank page pops up for a split second. Then within a half hour or so, it will pop up again. I deleted my cookies but the problem still persists. Does not happen on other browsers.

I get the following error when trying to delete emails:

Messages cannot be moved or copied because writing to the folder failed; to gain disk space, go to file, empty trash, then compact folders.

I have tried this and all trash folders are empty, yet the message remains, I cannot delete, move or receive emails. There are 970 emails in my inbox... I even rebooted several times after doing the above and it still does not work.

What ever instructional help is provided, please include how I can save some of those emails if possible as I don't want to loose them... Right now I have had to go to spectrum to be able to read any incoming emails. Thunderbird is bricked....

Please help...

Thank you

When I try to forward an article (to myself or others), I get a message: "Do you want to allow this app to make changes to your devices?" Whatever button I click on, it goes into Set-up mode, though it's already set up on my PC, and getting out of the sequence is difficult, like navigating blind alleys to nowhere.

Hello.

I use Firefox on an computer with Ubuntu, (installed as snap) and have noticed that since the update to version 140 (specifically, version 140.0 canonical-002-1.0), closing a tab causes a noticeable delay : that is, upon any action that would close a tab (clicking on the cross, pressing CTRL+w, or middle clicking), there is a delay of about 200 to 300 ms before the tab is actually closed.

However, during this delay, the window still responds to inputs, leading to rather annoying situations. For example, during regular usage, I usually open a great number of tabs. When I am done with browsing, I close them, by repeatedly clicking the cross button on the tabs. It used to be that the tab under the cursor would immediately close, then the next tab would slide under the cursor, and I would click again to close that one, etc.

But now, when clicking the cross button, the tab is not closed, and when I click again after a small delay (because of muscle memory), the tab is still there. This cause the two single clicks to be treated as a single double-click, which for some reason puts the window in full-screen mode (but only with the snap version; I'm not sure what's going on here).

When using CTRL+w when closing tabs, the delay is still there, but the inputs are correctly handled. If I press CTRL+w three times at the usual rate, I can see the three key presses, then nothing happens for a few instants, then the three tabs close at the same time (i.e. the delay is from input to tab close, not from tab close to other tab close).

This behaviour is completely absent on Firefox (also version 140) on my windows computer.

This delay does not appear when creating tabs, and it does not occur either when closing the window or when closing the last tab in the window (leading to an amusing situation where shutting down Firefox is actually faster then closing a tab). These operation keep going at their previous speed, immeasurably fast to the human eye.

Navigation does not appear to be meaningfully slower than before the update, and the CPU/memory usage is very reasonable.

Curiously, this appears to be a fixed delay. Closing an empty tab takes the same time as closing a very busy one. Closing a tab when there are five takes the same time as closing a tab when there are thirty.

This issue makes browsing feel incredibly sluggish.

Is there a solution for this problem ?

Edit 1 : I have tried to run Firefox in troubleshoot mode, but there was no difference in behaviour. Edit 2 : Fixed typo. Edit 3 : Added exact version. I also tried to refresh Firefox, but the issue remained. Edit 4 : The problem is still present in version 140.0.1 canonical-002-1.0. Edit 5 : The problem is still present in version 140.0.2 canonical-002-1.0.

I am moving thunderbird account to a new computer. After downloading and getting to login screen, I click 'done'. The programme only starts to re-assess/re-test the config. This happens whether manual or automatic configuration is chosen. When I click 'done', it only goes to find the config again. It does not begin importing the profile/account/emails.

I waited a few times ... so it could download the emails/profile/account - nothing happens. No 'progress bar' appears.

How do I get the programme to begin loading on this computer? Thank you in advance

As of July 1st I'm unable to open www.funnyjunk.com on firefox I can do it through chrome or a 3rd browser on my phone and a friend who uses firefox can do it too. I have DNS over HTTPs settings disabled, troubleshoot mode and private window didn't change anything. Afaik I haven't installed anything new between my last successful and first unsuccessful attempt.

Recently I noticed that in ALL of my Local Folders, I can no longer see any of the content. The headers show like normal, but I cannot open / read the content (presumably contained therein).

I have tried repairing individual folders, but nothing changes.

I have tried eliminating the .msf file, but nothing changes. A new .msf file is created, but the content is still not visible.

If I try and reply to a local email, the email is empty with the exception of the subject. Even though it shows the sender of the email (i.e. From), neither the email address nor the email content is copied into the reply.

I am slowly starting to worry that the individual files storing the email content are corrupt, but if I open the content file (i.e. non-.msf file) with Word, I get what I presume is the first / oldest email, but nothing more (even though the files are many MB large).

Is it significant that I have both "Local Folders" and "Local Folders.sbd" (as folders)? The content within them appears to be similar if not identical.

My email is stored on a NAS which I can access from any computer on my network (presuming I have set up Thunderbird appropriately); can this contribute to the issue?

Any other ideas which might lead to such an annoying issue? I really don't want to have lost all my emails for the past 20+ years.

Thanks in advance for any suggestions you make.

Suddenly they broke after the 140.0 update, but as it turns out, this is the case everywhere. Does anyone know what the problem is?

Verified on: Firefox Desktop, Chromium Desktop, Firefox Mobile Font: Calibri (No changes), Roboto (No changes) I've scoured half the internet, as if I were the only one with this problem...

I shop on several websites, and the customer review section does not appear on the product pages. Thinking extensions may be to blame, I tried opening those particular websites in a new private window. But I still was unable to see the reviews. It works fine on Edge. Is there any way to fix this?

I receive email fine. The website email works fine. I cannot send email via thunderbird and have not changed my settings which worked for years. my smtp account. I have rebooted my Windows 10 pc numerous times. What can do this? How can I fix this>

I'm trying to go into my work place drivers only webb site And the stupid GoDaddy thing keeps blocking me!!! Why am I being blocked from site I have book marked??? I don't want the stupid GoDaddy blooming me!!!

When I use Mozilla's VPN service...many mozilla vpn servers will block me from sending out emails giving this error message:

Sending of the message failed. An error occurred while sending mail. The mail server responded: Service unavailable; Client host [23.234.88.xxx] blocked using clients.rbl.e-scout.net; host 23.234.88.xxx blocked due to abusive behavior from your network. Please contact servers@ispn.net for resolution.. Please check the message recipient "xxxxxxx@xxxxxxxxx.com" and try again.

Mosilla's VPN service is blocking its own Thunderbird software from functioning...lolol Are you going to fix this Mozilla??? Looks like you're tripping over your own feet...

starting at the update before the most recent one (currently june 30 2025) my firefox browser on my windows 10 pc simply doe not work at all. i am surprised it actually loaded the support page allowing me to write this, but every other page i try to open gets stuck in infinite loading. next thing i am going to try is uninstalling/reinstalling I GUESS. firefox on my other PC and phone are totally fine. is this bc i am running windows 10? please help :C i installed chrome and its absolutely awful

I have a few passkeys saved in Proton Pass password manager. I can use them with any browser on any OS using various official browser extensions or applications. For Firefox, I use the proton pass extension (https://addons.mozilla.org/en-US/firefox/addon/proton-pass/).

The passkey for my Nintendo account doesn't work with Firefox. I tried with Firefox 140 on a Windows 10, on MacOS 15 (Sequoia) and on Linux (Ubuntu 22.04). Same problem each time: error message "couldn't complete passkey sign-in" (see the attached screenshot).

If I use the same passkey stored in Proton Pass with another browser, it works. I can log into my Nintendo account. I tried with Microsoft Edge on Windows 10 and on MacOS, and with Safari on an iPad.

It seems the issue is also related to the Nintendo website. I can log without problem into my Sony account (https://store.sony.com) using Firefox 140 and a passkey stored in Proton Pass.

Although I have successfully logged in many times, I get an error message today: An error occurred during a connection to b2clogin.firstenergycorp.com. PR_CONNECT_RESET_ERROR Error code: PR_CONNECT_RESET_ERROR

Secure Connection Failed

An error occurred during a connection to suneethi.sjd.kerala.gov.in. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

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