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Have used Thunderbird with Comcast/Xfinity for over 10 years. I can receive all of my email on Thunderbird. About 6 months ago I started to not be able to send emails from Thunderbird sporadically, but it has escalated to the point of not being able to send emails of my comcast.net accounts at all. From my gmail accounts I can send messages just fine through Thunderbird. Three weeks ago I spent 2 hours on the phone with Xfinity. Reset all the passwords, checked all the settings, etc etc. For the rest of that day I could send all emails through Thunderbird. Ever since that day, same problem. I spent another 2 hours on the phone yesterday with Xfinity and they are sending my issue to a 3rd or 4th tier support person. They say there is no guarantee they will find a solution and that I won't hear back until Monday or Tuesday. Also this is the same problem on 2 different computers. One computer has the newest Thunderbird update to version 128.1.0esr and the other has the last version of Thunderbird as 115.14.0.

Here is the exact error message I get when I try to send an email:

Sending of message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: resomta-s2p-647654.sys.comcast.net resomta-s2p-647654.sys.comcast.net Excessive failed authentication, ESMTP server temporarily not available.

The numbers after s2p- change for each attempt to send an email.

Believe me I have tried all sorts of different settings and I have read practically all of the solutions I could find on Mozilla's support forums and articles.

Really need help on this one. Jennifer

I've tried importing my old profile into the new profile. I get the following message: Import failed unexpectedly, more information may be available in the Error Console. Can I copy and paste folders like my old LOCAL and CALENDAR folders into my new profile?

Here's an answer that has not been shared in the Original Question of the same name.

Background: Starting today, I'm receiving an error message with accessing x.com and the x.com thread has been locked. The error message is "Firefox’s Enhanced Tracking Protection (Strict Mode) is known to cause issues on x.com". I've done all of the troubleshooting steps on the original question link and nothing worked.

However, @jsher2000 asked a very good question: Can you access a direct link to a user page such as

https://x.com/mozilla

Well, the answer was no, but I did notice one item: the URL was: https://x.com/?failedScript=vendor, so it looked like x was generating the error.

I then turned off NoScript for the tab and nothing. Turned off uBlock Origin and it started working. Turn uBlock Origin back on, it fails again. Disabled and it worked. Turned NoScript back on, no change, still worked. In the end, on uBlock Origin, the site "edgecastcdn.net" was blocked. Enabling that site allowed me to turn uBlock Origin back on.

Recently I reinstalled my Windows 11 system, and even though I synced my Firefox account before reinstalling the system, there are no passwords, settings and extensions, which should be synced.

I searched for the same problem, but all I could find was searching for profile files in C:\Windows.old

The issue is I do not have Windows.old folder or anything like that.

Is there any way to recover at least my passwords?

Thanks in advance for help.

Hello !!

Can anyone tell me why the android version of firefox doesn't show date/time on the history ?? It's such a basic thing that most other browser do.

At least in windows pc you you can see it, in a separate window. That's not ideal by any means, but at least you can.

I'm under the impression that the following setup used to work well, but ceased to sometime in the past:

Filter 1: ("junk from unknown senders"), enabled. - Apply filter when: Manually run, Getting new mail -> Filter before Junk Classification. - Match all of the following: From - isn't in my address book - Personal Address Book. - Perform these actions: Set Junk Status to: Junk.

Filter 2: ("delete all junk"), enabled. - Apply filter when: Manually run, Getting new mail -> Filter after Junk Classification. - Match all of the following: Junk status - is - Junk. - Perform these actions: Move Message to - Junk on myaddress@myprovider.com.

Filter 2 is lower down the list of filters.

Filter 2 works as I expect it when I run it manually with 'Tools'->'Run Filters on Folder'. However it is either never executed, or never succeeds in moving messages to the Junk folder when it is called automatically under the "Getting new mail" condition. I check mail automatically every 10 minutes on this IMAP account, but the messages marked as Junk by filter 1 are never moved to the Junk folder.

What might explain this?

Thanks and appreciation to all the volunteers answering questions for the public on this site.

Details: running v115.13.0 on Debian.

Ever since Facebook started infesting the chats with end-to-end encryption (random chats get "Messenger upgraded the security of this chat. Messages and calls are secured with end-to-end encryption" without my permission or asking if I want this), any encrypted chats have audio and video calls disabled. I note that I have ONE friend for whom it didn't do this, I can still do calls with her. If I receive a call, I get a pop-up saying that to receive this call I must download the Messenger app (no way) or a browser which supports it. If I check what browsers it thinks supports this, it only lists Chrome and Edge. As far as I know Edge is just Internet Explorer renamed, the biggest black hole in security, I've never touched it. Chrome ignores industry standards, so I don't use it. Making Firefox the best, top browser available. It's the only browser I wish to use. Mozilla needs to look into how to get Facebook to stop blacklisting Firefox like this. Note that this E2EE garbage has only been infecting things for the last few months, before that I was perfectly able to do any calls I wished in Facebook Messenger.

With the recent update to Mozilla (128.1.Oesr), I'm no longer able to check my email at my work address. I get an invalid certificate error. I have always gotten this error at this address but in the past I've been able to ignore it and keep on. Now I don't see any option to ignore it, and I'm unable to check my email. This is a non-starter. I need to be able to keep in touch with work.

Thanks, John Mumaw

I have uninstalled reinstalled etc etc over and over and Firefox still minimizes itself when reading articles or just about anything. No other browser does this. What could be the problem?

A lot of my bookmarks are just global icon signs when I click them, nothing happens, some that are proper icon signs, will list take me to any random site, tried restoring and restarting, to no avail ,this is a long standing issue, affecting both bookmark toolbar and other bookmarks. Even tried reinstalling Firefox, the issue still stands Firefox is otherwise perfect, I've now run out of ideas, any help would be appreciated from Patrick

I recently upgraded to Thunderbird 128 and in my email archive from 1996 to 2008 I am no longer able to view any emails from prior to June 1999. I just get a blank page when I open the messages. I can still see the email summary under the folder.

Is this a known issue with the release?

How I can better diagnose what it going on? The emails were previously ok on prior versions.

Thanks.

Michael.

Hello Mozilla community,

I'm encountering a perplexing issue with Mozilla Firefox that I hope someone here can help me with. Whenever I set Mozilla Firefox as my default browser, I experience difficulties accessing my website. The site continuously buffers but never fully loads, leaving me unable to view its content when i click on (How I Sleep at Night Knowing I’m Failing All My Cl – Tymoff).

However, when I switch to a different browser as my default, such as Google Chrome or Microsoft Edge, the website loads without any issues. This leads me to believe that the problem might be specific to Mozilla Firefox.

I've tried troubleshooting by clearing the browser cache, disabling extensions, and even reinstalling Firefox, but the problem persists. I've also checked for any errors in the browser console, but nothing seems out of the ordinary.

Could there be any compatibility issues between my website and Mozilla Firefox that are causing this problem? Or is there something else I should investigate to resolve this issue?

Any insights or suggestions would be greatly appreciated. Thank you in advance for your assistance!