所有产品 社区论坛

Being able to tell anyone what's going on is almost impossible. I am thinking of deleting Firefox despite having been using it for years, a loyal customer who subscribes to your VPN. When I log in my pinned tabs do not open the web sites, I'm told I've got connection issues, I've removed the sites from tracking protection, X tells me that is an issue since it only started after the update before todays update. What is the point of pinned tabs if they don't open? If I can't resolve this issue I will use Chrome, All of my pinned sites open there I just have to get used to using another browser, I don't like Chrome very much but I'm pulling my hair out getting no joy from Firefox. There has to be a better way of contacting Firefox than spend ages online as though it's top secret! I'm using windows 11 24H2

Dear community members, Since receiving the Thurderbird release 140.4.0esr on Oct 14th, I have not been able to send email from any of my accounts (2xIMAP and 3xoffice365 through OWL). Nothing has changed in the account settings. Receive works ok. The usual easy fixes do not seem to work (restart, firewall switch-off, etc.). Any ideas beyond having to rewind to an earlier version and rebuild the whole thing (hopefully not!)?

Version 140.4.0esr Build ID 20251010020716 User Agent Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:140.0) Gecko/20100101 Thunderbird/140.4.0 OS Darwin 24.6.0 Darwin Kernel Version 24.6.0: Mon Jul 14 11:30:30 PDT 2025; root:xnu-11417.140.69~1/RELEASE_ARM64_T6020

Thank you for your help! Heli

How do I disable the donation webpage that opens (in Thunderbird) automatically?

A common suggestion is to disable the start page: https://support.mozilla.org/en-US/questions/1226585 https://support.mozilla.org/en-US/questions/1520014 https://support.mozilla.org/en-US/questions/1515838 https://support.mozilla.org/en-US/questions/1507571 That option is already unchecked.

Some seem to be suggesting that this page opens when an update happens: https://support.mozilla.org/en-US/questions/1512477 There was no update installed lately.

just recently firefox has been adding pop-up summaries to each address bar open tab .... the summary is a tiny 5 or 6 word pop-up describing what that website is supposed to be doing and the pop-up appears instantly whenever the cursor contacts that tab..........how can i turn that unwanted pop-up feature OFF

dell inspiron 3910 running windows 11

https://www.onlineservices.nsdl.com/paam/login.html not open this site plz help me

I had to replace my hard drive recently, and with it my Firefox install. I managed to transfer everything over to the new install, except for the URLs in Reading List. The extension itself made it over; just not any of the URLs I stored in it.

In theory, I know that I can scrounge through the Firefox install on my old hard drive and grab the necessary files, but I have no idea how I'd go about doing that. I can't rely on folder names, since those are based on extension IDs that are generated when I install the extension, and the files themselves are too opaque to glean anything useful from (Notepad++ didn't turn anything up, so I'm assuming the extension data's compressed).

Other than that, I've tried:

• Running this tool to see if there was anything I could use. There wasn't.
• Trying Load Temporary Add-ons to identify the Add-on I wanted. I accidentally erased my feeds on RSS Feed Reader doing this, so there's another extension whose data I need to restore. (It was fine before I tried Load Temporary Add-ons.)

Hello, I am Firefox Android user and i am having issue with Firefox while browsing substack.com website, When i open that website from a chromium based browser it works well but in Firefox it is slow and in my old mobile(android 9) which is even slower and i never wanted to open it. Twitter(X) is also heavier to open. I stopped using it from Firefox and using a chromium browser for these logins.

Firefox has all the features i wanted and i am satisfied that it is better than any other browser but lacks in performance. It is not smooth as Chromium browser.

Please look into it and it would be great if it just be more smooth like Chromium based browsers.

Thank you

I’m using Thunderbird to connect my Hotmail account. The setup shows as “successfully added,” but an error message appears:

“The operation on Inbox did not succeed. The mail server for account responded: User is authenticated but not connected.”

Previously, the connection worked perfectly, but starting this week, Thunderbird can no longer access or sync the hotmail mailbox.

How to fix this problem!!???

For example, this code in userChrome.css will work for showing a custom favicon on the bookmarks toolbar:

.bookmark-item[label="Bookmark"] image {

   width:0!important;
   height:0!important;
   padding: 0 0 16px 16px !important;
   background:url(custom-icon.png)!important; 
   background-size: 16px !important;

}

However, after a recent update, if the bookmark is located inside a folder, the custom favicon will not be displayed and it will revert to the websites favicon.

See the attached image example of a bookmark on the toolbar vs. inside a folder.

Hi All, I have been sending emails through Android Thunderbird, but they aren't being synced to the server, so I can't see them anywhere else. I've set the Sent folder to sync (as well as the Inbox). Pressing the sync button just spins the indicator, but doesn't actually sync. When I try to move or copy messages, an error comes up saying that messages can't be copied or moved that aren't synconised. How can all my messages (sent, inbox, everything) be synced so that I can see them everywhere? I've just turned on sync debugging, will see the results soon.

When I used to go in to the Thunderbird inbox screen there would be a page with instructions on such things as deleting a message etc. Now, the only way to delete a message is to use "rubbish bin" icon. I would like my "instructions" page back!

I just installed Thunderbird but it cannot accept the password that I used which I thought would be the PW for my email account. Please let me know if this is incorrect and what password it is looking for.

I've been using Thunderbird to access my Comcast email for two years now, without problems. Except yesterday & today, when I've been unable to send or receive emails, for no apparent reason. Yet, when I connect to my Comcast/Xfinity email via the Comcast browser website, sending and receiving of email works fine. This access problem began yesterday, 10/14/2025.

Same email address I've been using for about 20 years now, and same password. I made no changes to my Thunderbird or Comcast settings. Sending a test email to myself via the Comcast email website works fine. Clicking on the "Get Messages" icon in Thunderbird results in no action whatsoever. Sending a test message to myself in Thunderbird results in about a 40 second delay (usually it's 10 seconds), and then the error message "Login to server smtp.comcast.net with username don-peters@comcast.net failed." It then asks if I want to try again, but if I agree, the same error results. But there is also the option of "Enter new password". Click on that and the same error results, without even asking for a new password. But my password is OK, as evidenced by my Thunderbird settings and being able to log into Comcast browser email.

Yes, I've spent hours on the phone with Comcast on this issue, but they were of no help. One agent claimed that the issue was with Thunderbird, not Comcast, as its webmail worked fine. Two years ago, I had a similar problem I spent hours trying to solve. It turned out the problem then was due to Microsoft Outlook on my PC regularly trying to log into Comcast to ALSO download my email - BUT using the wrong password. Comcast interpreted these multiple failed login attempts as scammer attempts, and blocked ALL email logins from my PC. I fixed the problem by shutting down Outlook. But when I just spoke to Comcast they said the current problem was NOT due to my account getting blocked by them. But they couldn't give a reason for the blockage.

So, I now believe the problem lies with BOTH Thunderbird and Comcast. First of all, Comcast is somehow blocking my Thunderbird access attempts. But Thunderbird is also at fault for not reporting a SPECIFIC email login problem, so that we can address it - and fix it. If Thunderbird can be more specific as to why login attempts are failing, I can get back to them with the evidence - and hopefully solve the problem.

I've been using Thunderbird for about 30 years now, and I hate to give it up. But if this continues, I'll be forced to abandon Thunderbird.

ブラウザゲームサイトUnityroomなどでゲームを遊んでいると、Cookieの容量が10ギガバイトを超えることがよくあります。 どうやら10ギガバイト以上のcookieをFirefoxでは保存できないようです。 FirefoxでのCookieの容量を10ギガバイト以上にしたり、ページごとに個別に管理できるようにしてほしいです。

Hi, On another laptop (Dell) and copied profile (attached screens). "Send" is gone (Ctrl+Enter works too). Can I reset my profile as it is? Not needing a new profile (I think) or how this helps.

https://www.google.com/search?q=restore+defaults+in+thunderbird&oq=restore+defaults+in+thunderbird&gs_lcrp=EgRlZGdlKgYIABBFGDkyBggAEEUYOTIHCAEQIRifBTIHCAIQIRifBTIHCAMQIRifBTIHCAQQIRifBTIHCAUQIRifBTIHCAYQIRifBTIHCAcQIRifBTIHCAgQIRifBdIBCTY1MDIxajBqM6gCALACAA&sourceid=chrome&ie=UTF-8

Thanks!!!

For the past few weeks, I have been intermittently but stubbornly getting the beachball of death when I open Firefox, coupled with Force Quit. Sometimes I force quit and then restart and it's fine. Sometimes I force quiet repeatedly and it continues not to open. Sometimes I restart my laptop and that fixes it, but sometimes not.

I do have a lot of tabs open, but i have always had a lot of tabs open. This thing is new.

What could have changed? What do I need to do, fix, trash, or curse?

(In simple language, like for your unsavvy grandma please?)