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The first problem cropped up immediately: Thunderbird has done a pretty good job for years of recognizing my email preferences for Inbox, Trash and Junk; now it no longer delivers email to my Inbox or Trash at startup. Almost all of my email goes to the Junk folder, including that from whitelisted senders. All of my individual spam filters and my whitelist are set to act when email is received, but I have to run the whitelist manually to get it to work (sometimes more than once). The only way I can get things into the Trash folder is to put them there manually, as TB apparently has forgotten everything it learned about my email preferences. I did take the opportunity to update my Whitelist (though to no avail), so I guess I'm sort of glad that I was goaded into doing so. But it hasn't helped.

As of tonight, I can't write or reply to an email or edit an email draft because TB locks up while it is "Copying messages to Drafts..." I've had to close TB ten or twelve times, and I've not been given the opportunity to make a bug comment during the closing routine.

I have emptied the TB cache in hopes that doing so would clear up these issues. Though that works well in Firefox, it didn't help with these problems.

I also am not too happy about the disappearance of the File Edit ... folder bar and its being replaced with a hamburger drop-down menu at the upper right, but at least it will suffice once I've unlearned almost thirty years of doing things a certain way.

I really don't want to stop using Thunderbird. I like the program, and I'd hate to have wasted the two solid weeks it took to get Yahoo! Mail to acknowledge its existence and let me connect to their service, which I did under duress. Not that I'm a masochist or anything.

Windows 11 Ver. 24H2 (OS Build 26.100.4351) Thunderbird Ver. 139.0.2 (64-bit) HP something-or-other tower computer, vintage 2021

Tbird starts to d/l messages: "nn of mm new messages" counts up and just before it gets to the last few, it stops. It doesn't put the retrieved messages in the inbox or anything. Then it gives this error message:

"The DELE command did not succeed. Error marking a message as deleted. Mail server pop.mail.yahoo.com responded: Too many requests."

But this is POP mail, so delete request don't go back to the mail server. The number of emails deleted from the local db shouldn't have any effect on d/l... I'm mightily confused.

Yes, I did delete thousands of old emails. Still shouldn't make any difference for retrieving mail, nor should the client be overwhelmed by commands it successfully executed days ago.

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.

After recent update, I can not browse any addons. The site https://addons.mozilla.org does not open, shows the connection timed out. I uninstalled and reinstalled firefox deleteting all firefox related files. The problem still persists. Other than this all the using browsing I do are all working fine. Just this extensions I cannot browse. When I click the extension icon by default it shows some extensions, I can Install them. The problem is I can not browse them. Even the recomendation tab is also empty.

PS: I am using firefox on manjaro linux.

I was searching for an email that I had just deleted and discovered that the Trash folder connected to my inbox was empty. The one connected to my Local folders, however, was not. I cannot find a setting that would instruct Thunderbird on how long to save emails in the Trash folder and am sure I did not accidentally change anything. Any idea how to fix this?

Hi

The new tab page is amazing on iOS but if I disable the four options on settings>support the tab page rolls back to the prior version using the old layout without that beautiful animation. Thanks.

TB on PC: have noticed that my Calendar entries are not syncing up to Outlook.com. Entries added directly to Outlook.com sync okay to my PC TB. Contacts sync works fine both ways. I just upgraded to TB 128.12 but no change. I have checked all the TB Outlook server entries and they appear correct. Any ideas? Thanks.

Since recently 1~2 version, my Firefox keeps consume large amount of memory and release it repeatedly

Even I restart Firefox and do nothing, it will start doing this again

I use about:processes and about:memory to capture this seems the main process's "tab.query" causing this, please check

PS: sometime it will consume till system max (64GB) and cause my OS out of memory. PS2: that wave-like memory usage is cause by Firefox

To Whom It May Concern,

I am Muhammad Rizwan, a user of a Samsung J3 6 mobile phone, and I am experiencing a persistent and widespread issue with web permissions specifically within the Firefox browser on my device. This problem is not limited to a single website but affects multiple online services requiring various permissions.

The details of the issue are as follows:

Location Access Problem:

Despite granting explicit permission for location access on various websites, including Yandex Maps, within Firefox, the sites consistently display messages such as "Unable to determine your location" or similar error notifications.

I have verified that my phone's general location settings are enabled and set to "High Accuracy Mode." GPS signals are generally stable in my area.

Microphone and Other Permissions:

Beyond location, I am encountering similar difficulties with microphone access and other web permissions (e.g., camera, if applicable) on different websites accessed via Firefox. Websites request and are seemingly granted permission, but the functionality does not activate or remains unusable.

This issue is not confined to one specific website; it appears to be a systemic problem affecting nearly all websites that require these permissions when browsed through Firefox.

I have already attempted the following basic troubleshooting steps:

Cleared Firefox's cache and site-specific data for affected websites.

Restarted the Firefox browser.

Restarted the phone.

Confirmed that my phone's date and time settings are correct.

Verified that I am not using any VPN or proxy services.

The inability to properly utilize these web permissions within Firefox on my Samsung J3 6 is significantly hindering my ability to access and use various online services effectively. I kindly request your assistance in investigating this matter and providing guidance on a potential resolution.

Thank your for your time and attention to this urgent issue.

Sincerely, Muhammad Rizwan Email: mrizwan9@yandex.com

We have recently been caught in an apparent marketing test simulation by an AI provider who we would never expect to prevent productivity resulting in great harm to those I support. So when emails were going nowhere and set MFA was systematically destroyed -- I turn to FireFox ESR personal to ensure my data remains secure among those world class suppliers I have trusted for years.

I trust FF but the subtle ways in which our WIndows10Pro is trying to wipe out all relationship with other OEMs - I want to be sure that FF is set up as it should be. It appears even in FF private browser window - that the OS or Copiliot is attempting to destroy that also as part of what is some scheme according to bank Fraud experts I've consulted as a scheme to destroy Win10 home office usage and force move to WIn11.

My home PC has supported many many individuals and organizations. I cannot believe what I have been put through,. Still rebuilding relationships with the worldclass firms I rely on.

What are the definitive steps that will ensure that data cannot be manipulated and OS cannot randomly overwrite desperately needed Disabilty / Accessiblity changes needed to even see the "simulations?' at 1-2point font. This activity is allegedly CoPilot - which would be the last place I would suspect. The violations of trust and data integrity go way beyond what you might imagine.

How to protect from any and all deceptive practices where what I"m seeing and doing are not being alterered in such ways that prevent me from supporting a Hipaa client because a rogue software misrepresnts and destroys valuable data and more importantly TRUST.

Part of undoing damage due to Coplilot is to follow those I trust - so regarding Firefox I download it from official Mozilla / Firefox - current ESR version for Personal use. - I try now to do most work that requires a modicum of importance - and still each moment there's some deceptive something or other trying to deceive me into excluding Firefox.

I'm not here to blame Copilot - and MS accountability for this is reported via the public domain and several professionals I've consulted. Feeling handicapped with handicapped devices. Totally hostage to a system that wants to ensure everything we do is via Microsoft.

There's a time and a place for security we can trust. I had security keys and MFA out the wazoo. It's taken amonth to even begin to get back to a secure wiped licensed Win10 system. And the first job was to ensure the OS could not mess with Firefox. Something is tearing at that already. My only involvement with MS at this point is to ensure they don't mess with FF's integrity. The FF account is an outlook address so pls LMK if that is hurting rather than helping.

I cant do anything if trust is violated and data is changed intentionally by a rogue software. Plus the overwritiung of accessiblity / disabilty modifications is unconscionable.

HOW TO KNOW I'M NOT MISSING THE LATEST TRICKS DESIGNED to take away FIrefox or others who we trust.

Installation of the latest version during installation proceeds to the Finish option then goes to a Blank Screen with a Done at the bottom. The screen eventually after multiple clicks responds with "Thunderbird isn't responding".

I had been using the client with no problems with multiplr email accounts! Very frustrating after multiple attempts to identify the problem including the Trouble shoter having the same problem. Pease Help!!!!!!!!!!!!!!!

I am able to style tasks that are either completed/overdue/inprogress in userChrome.css . But so far I have not found a way to style canceled tasks.

Can someone help me ?

when playing my game the program keeps stopping and starting. Every 7 to 9 seconds while playing my game I get kicked to the task bar and it stops responding for a few seconds and when I click to put it back on my screen and again 7 or 9 seconds I have to repeat the same thing. Bottom line is the gaming program keeps starting and stopping for a few second. This is the only program doing this. This started doing this on June 28 2025 after a new Firefox update. I played this same game on Google and it worked just fine.

Hello,

I have not found an answer to my question anywhere, nor can I solve the problem I have encountered on my own. The thing is that when I log into my YouTube account and then close the browser, turn off the tablet, after restarting I have to go through the process of logging in to my YouTube account again. I think the browser is great. I am talking about the Firefox Focus browser. This problem does not occur on Firefox, but for my old hardware it is too slow.

Arek