"Firefox is being updated by another instance" is driving me crazy !

Since I upgraded from FF128-esr to FF140-esr I always get the "Firefox is being updated by another instance" This is really driving me crazy, as I checked / did / .... ev… (читать ещё)

Since I upgraded from FF128-esr to FF140-esr I always get the "Firefox is being updated by another instance" This is really driving me crazy, as I checked / did / .... everything (and even more) I found on the internet related to that.

Nothing helps !

Creating and using a new default profile didn't help

Finally I ended up uninstalling FF completely (making sure no -zero- leftovers remained in ProgramFiles, AppData a.s.o.), and reinstalled FF140.7.0-esr freshly. After installation I started FF immediately with the created default profile (only existing one) --> SAME THING : "Firefox is being updated by another instance"

And this is really a FF140 thing, when I go back to FF128, on the same computer, same profiles, ...., the problem is gone.

I would like to know in detail what checks are really done by FF to decide to give that "Firefox is being updated by another instance"

Open 15 1 196

New crash report every time i press submit crash report

I was using TB like normally on windows 11 when it crashed. Now every time i try to open the app it prompts me to send in a crash report, but every time i press "restart … (читать ещё)

I was using TB like normally on windows 11 when it crashed. Now every time i try to open the app it prompts me to send in a crash report, but every time i press "restart thunderbird" a new window with crash report shows up. I have tried writing a comment, checking and unchecking all the boxes and pressing quit thunderbird. But i still get sent into the loop.

Open 3 148

If a Telecom uses real Email, i/.e. not WEBmail, and they use POP3...

Hello, and thanks for the read... ISSUE: Every day I have to call the telecom ROGERS that took over for telecom SHAW, turn IMAP and Pop3 on 9 Email accounts (they lost 1)… (читать ещё)

Hello, and thanks for the read...

ISSUE: Every day I have to call the telecom ROGERS that took over for telecom SHAW, turn IMAP and Pop3 on 9 Email accounts (they lost 1). Sometimes the 1 to 2 hors chat w/ a human turned it back on will not last long.

DETAILS:

  1. I can receive outside Emails *because I can't send using Shaw/Rogers, checking for Email, just hangs at trying to login in to any of the 9/10 emails.
  2. When I can get a support person to check, they tell me that IMAP and POP3 are turned off.
  3. They will tell me they re-enabled it. But it doesn't enable for me.
  4. It all works OK when using the online webmail Zimbra. However, I need to check 3 of the 9 email accounts every hour, others every 6 hours, and others once a day at boot.

QUESTION: When using POP3, does the setting on my SMTP need a special setting on Thunderbird?.

NOTE: I am complying with "Rogers With Shaw" passing the buck to the Email Client (Thunderbird) by asking here - "Could It Be The Email Client'! And my answer is 'No', because Thunderbird works perfectly with 54 other Email accounts.

Thank for reading this, and for any input you may add, ~r

P.S., I'd like to see a upgrade to this input form that allows us to Preview out Post And, when I started this Post, it alerady had a image from a previous Post

Open 6 90

All of my history has disappeared

All of my history except of today's has disappeared. I did not erase my history, and really need it back. I did try to remove a couple of sites from my Most Visited, as… (читать ещё)

All of my history except of today's has disappeared. I did not erase my history, and really need it back. I did try to remove a couple of sites from my Most Visited, as Firefox was saving all sorts of sites I don't really visit often. In addition, I am being asked to sign in with my password at every site I go to where as before I was automatically allowed to enter, as all my passwords are saved. What happened - and how can I get back to normal?

Contributor note: bookmarks are also missing (/questions/1578816).

Open 2 70

latest firefox is continuously refreshing the page on a Website, both Windows11 and Linux versions. Website loaded ok previously and still loads ok using Chrome. Why?

Firefox version 152.0 : Firefox is continuously refreshing the page on a particular Website, in both Windows11 and Linux versions, making the site unusable ( unable to cl… (читать ещё)

Firefox version 152.0 : Firefox is continuously refreshing the page on a particular Website, in both Windows11 and Linux versions, making the site unusable ( unable to click anything ). The website loaded ok previously using Firefox and still loads ok using Chrome. Disabling extensions doesn't help, neither does deleting the cache and cookies. What changed and why? Is there anything else to try?

Open 15 58

Cannot see historic emails

- Thunderbird set up 19/05 & email/ history /folders downloaded - Moved from DNS to GANDI Email server provider this week but now all folders/historic email are no lo… (читать ещё)

- Thunderbird set up 19/05 & email/ history /folders downloaded - Moved from DNS to GANDI Email server provider this week but now all folders/historic email are no longer visible in Thunderbird email - How do I get them back and how do I synchronise Thunderbird & Gandi so that emails shown in WEBMAIL include all History and not just new emails since Gandi switched on? Thank you.

Open 4 58

How do I stop FireFox from telling me to set it as the default.

How do I stop this page from coming up several times a day. I have already set FireFox as my default browser, several times, but to no avail. I've careful followed your… (читать ещё)

How do I stop this page from coming up several times a day. I have already set FireFox as my default browser, several times, but to no avail. I've careful followed your instructions. I dislike MS and have used FF for years. If this doesn't stop, I'll search for another browser that hopefully behave. I have set it on 4 computers, 2 Win 10, 2 Win 11.

By the way, the computers show FireFox twice, but only one actual installation.

Please do better!

Open 7 50

Not prompted/notified for Thunderbird Update

I had logged this issue in early 2025 but it has never been resolved and still exists. I received a reply today, Tuesday 7th July, from Wayne Mery, who said "If you are s… (читать ещё)

I had logged this issue in early 2025 but it has never been resolved and still exists.

I received a reply today, Tuesday 7th July, from Wayne Mery, who said "If you are still having problems when using a newer version, please post a new question and we'll take a new look at it.". as the original post has been archived.

So, here are the details:

"I am currently running Thunderbird 152.0.1 (64-bit) and I don't get an automatic prompt for updates and haven't been getting them since I updated to Supernova and now Nebula.

I have the settings set to Check for updates, but let me choose whether to install them, which is the setting I have always had and I used to get automatic prompts for updates with a window opening to show the details of the update as I get in Firefox.

Can someone tell me how to get these automatic updates back."

I have attached a screenshot of the original version.

Thanks.

Open 2 38

Copying account to local folders

Hello dear forum Here are the details: Account type: Microsoft Exchange (via OWL) Antivirus software and firewall used: Bitdefender I have the following problem: I copied… (читать ещё)

Hello dear forum Here are the details: Account type: Microsoft Exchange (via OWL) Antivirus software and firewall used: Bitdefender I have the following problem: I copied the mbox files from the active account (profile) to Local Folders (as described in some forums), both with and without *.msf files (seems this makes no difference to the problem). Then I start Thunderbird, and all folders and subfolders appear in Local Folders. However, when I go into one of these copied folders or subfolders, it only displays a single email. The copied folder is the same size as the original, but no other emails are displayed, and this is repeated in every subfolder. I employed the repair function with no result. The import/export tool NG only copies half of the emails. The total is 4.25 GB. I can only copy the emails manually via copy/paste, but this is very error-prone and takes a very long time. Has anyone had experience copying mbox files and managed to do it successfully? I would be very grateful for any advice.

Open 10 20

Проблема с открытием новых писем

Good afternoon, We are experiencing the following issue. I work as a Technical Support Engineer at a large company in Russia. All of our branches use Thunderbird as their… (читать ещё)

Good afternoon,

We are experiencing the following issue.

I work as a Technical Support Engineer at a large company in Russia. All of our branches use Thunderbird as their email client.

Approximately three weeks ago, we started receiving reports from users that their email was no longer working.

After investigating the issue and trying to identify the root cause, we have not been able to find a permanent solution. We have already tried the following:

1. Completely clearing the cache, rebuilding the mailbox while preserving emails, and allowing Thunderbird to re-download all messages. 2. Changing the `mail.server.default.mime_parts_on_demand` and `mail.imap.mime_parts_on_demand` configuration settings to `false`, clearing the Trash folder, and restarting Thunderbird. (This only provided a temporary fix.) 3. Reinstalling Thunderbird and creating a fresh client installation. 4. Using the **Repair Folder** and **Compact Folder** options for every mailbox folder. 5. Several other troubleshooting methods found online, none of which resolved the issue.

According to multiple users from different departments who are not connected to one another, they all describe the same behavior:

Thunderbird stops working for about half a day. Then it starts working normally for approximately 15–30 minutes, after which it stops working again for another several hours. During these periods, no new emails are downloaded, regardless of the size or content of the messages.

When checking the mailbox size in Exchange, it reports:

  • 3.56 GB used. The quota is unlimited.

However, on the local computer, the Thunderbird profile folder (`Thunderbird > Profiles`) occupies nearly 9 GB. If we calculate the size of all mailbox folders within Thunderbird itself, the total is approximately 6 GB.

Does anyone have any suggestions on what else we can try?

Has anyone experienced a similar issue or found a solution?

At this point, our employees are unable to work effectively because email is a critical part of their daily workflow, and we have been unable to identify a permanent fix.

Open 1 19

I have recently not been able to view important parts of legitimate web site using the Firefox browser.

I have been told to disable my ad-blocker by some commercial web sites and I understand that. But I am also not seeing charts and other non-ad items on web sites such as … (читать ещё)

I have been told to disable my ad-blocker by some commercial web sites and I understand that. But I am also not seeing charts and other non-ad items on web sites such as this one: https://www.medscape.com/viewarticle/alcohols-health-myth-over-how-tell-patients-2026a1000map?ecd=wnl_tp10_daily_260703_MSCPEDIT_etid8475291&uac=146695DK&impID=8475291. I don't want to change my default browser but this is a recent development that seems to be impairing my viewing of pertinent items placed on legitimate web sites. Could you please tell me how to adjust my browser settings to stop this from happening? Thank you! Best regards, Bill Strike

Open 2 10

Profile/session doesn't ever save/load

I run normal firefox on linux. Fully up-to-date. Every time I quit the app, it reverts to a version of my profile from a month ago, and loads all the tabs I had open then… (читать ещё)

I run normal firefox on linux. Fully up-to-date. Every time I quit the app, it reverts to a version of my profile from a month ago, and loads all the tabs I had open then, and then receives all the tabs that I sent to the device in the interim (~1 month). As I speak, it just caught the 60 or 70 tabs in this window.

I tried changing the name of my profile folder to randomstring.defaultOLD and changed one of the backups to randomstring.default. This didn't change the behavior. I'm still stuck in the loop. I saved my tabs with onetab, because firefox isn't remembering my session anymore. I thought it was something to do with updates, like it only loses its mind upon updates, but that's not true. It thinks it's updating firefox EVERY TIME, because the one time it's loading to 1 month ago it was updating, but I'm 100% sure there are no updates to firefox in my linux. It's just hallucinating.

The articles on restoring from backup are outdated. They say to use an html file. There is no html file. It's just folders for profiles, not html files. HELP!

Open 17 10

Synced data from previous Windows Installation

Hi, I had to reinstall my windows where I thought my Firefox would sync up upon reinstallation. However, nothing would sync up and the best I could do myself was to impor… (читать ещё)

Hi, I had to reinstall my windows where I thought my Firefox would sync up upon reinstallation. However, nothing would sync up and the best I could do myself was to import pretty out-of-date Chrome data. When I to my firefox account and scroll to connected services I see my last PC name with its firefox login. Is there any way to recover that data and import to my current device? I read you kept sync data as encrypted data on your Mozilla servers, so I hope that's a viable solution.

Open 4 10

Problem in Updating Thunderbird V17.0.9 to most current

I have changed the website hosting company from my previous one to scalahosting.com, which in turn appears to be using grok.viawebhost.com as their mailserver. I was a us… (читать ещё)

I have changed the website hosting company from my previous one to scalahosting.com, which in turn appears to be using grok.viawebhost.com as their mailserver.

I was a user of Eudora 7.1 for many years, but because of this change of hosting company, the Eudora email program would not connect to the Scalahosting site.

Thus I was forced to change to Thunderbird. After reading several webposting on this matter, I found and uploaded V17.0.9 and proceeded to convert the Eudora email, filters and addresses to the Thunderbird format.

This was not an easy task, and even with Google's AI assistance, I had to restart several times, but as of today - mid-Jun I have now completed the task of cleaning up all the email, installing the correct headers, etc that allows the Thunderbird program to open and correctly display all of those email without any problems.

I further cleaned up and corrected all of the Eudora filters to the TB format and now have those filters in TB to be able to be installed and correctly are accepted by the TB program.

Like wise with the contact addressee that were in the Eudora NNdbase.nnt file were cleaned up and correctly installed in the TB program.

However, the current status of the TB program is that it does not seem to be able to connect to the Scala Webhosting email site at grok.viawebhost.com. Enclosed is a pic of the supposed correct set up for the STMP at Port 465.

The other Port info from Scala is: POP3 - 995 (SSL) IMAP - 993 (SSL)

But I am not sure what else I need to do to correctly set up this older version so that I can start the collection process of the most recent emails sitting in the mailserver.

Further, it was suggested that I need to update the TB V17.0.9 to the most recent V151 by following the below sequence of updates:

According to Mozilla Support Documentation, this is the exact, official sequence to migrate safely from a legacy version:

Step 1: Run V24.8.0 (32-bit) (This updates the raw database schema out of V17. Upgrades the raw Mbox structures.)

Step 2: Run V45.8.0 (32-bit) (Stabilizes the folder indexing schema.)

Step 3: Run V52.9.1 (32-bit) (The final 32-bit staging version.60.9.1 (64-bit). Migrates the architecture to 64-bit processing.)

Step 4: Run V60.9.1 (This is the critical gatekeeper version required to unlock modern automatic profile conversion).

Step 5: Run V78.14 (This shifts the mail indexing formats).

Step 6: Run V102.15.1 (This modernizes the folder structure configurations).

Step 7: Final jump to V151.0.1 (Updates the background engine to current web standards).


I am looking any advice or suggestions from the Community that can assist me in completing this conversion to the TB program and get it fully functional so I can connect to the Scala Hosting mailserver.

Many thanks in advance for your assistance.

/s/ James T Saint

Open 5 10

Firefox upon launc advised installing updates and then all my desktop flashed. I had no installations planned or done. Is this malware or real?

See the subject. I've been seeing delays in launching for several months. I've run several windows defender malware checks (full and the one where it runs outside of any… (читать ещё)

See the subject. I've been seeing delays in launching for several months. I've run several windows defender malware checks (full and the one where it runs outside of anything brought up). I've reset firefox. I did all this also because I was seeing random ads from a news site from what they were trying to get me to do was install macafee (but it's malware). While I'm not seeing those ads now and I'm suspicious they can from the news site vs. my browser, I'm very aware of anything trying to capture screen scrapes. I'm even considering changing all my passwords as I'm not sure if anything was captured. This morning, firefox upon launch took a long time. Then it said installing updates. My desktop flashed and firefox launched. I have not installed anything or any addons, extensions, etc. So either this was firefox doing an update it needed or it's something else. I'm on windows 10.

Open 10

Error message: Sending of password for user did not succeed. Mail server pop.earthlink.net responded: Internal error

I'm running Thunderbird v.115.10.1 on a Mac. All of a sudden, I am getting the following error message when I open up TB or check email: "Sending of password for user did… (читать ещё)

I'm running Thunderbird v.115.10.1 on a Mac. All of a sudden, I am getting the following error message when I open up TB or check email: "Sending of password for user did not succeed. Mail server pop.earthlink.net responded: Internal error”. If I exit TB and log back in, I usually don't get the error message again and TB downloads incoming emails. I have no problem sending emails. It is still usable, but annoying because it happens 75% of the time. Any help is greatly appreciated. Thank you. -Dave

Open 10

Opening new messages has changed from "one click" to "double click" operation.

I'm running Thunderbird Ver 152.0.1 with Windows 11. I have things set up so that I just need a single click to open a program, folder or file. This also was the case un… (читать ещё)

I'm running Thunderbird Ver 152.0.1 with Windows 11. I have things set up so that I just need a single click to open a program, folder or file.

This also was the case until just recently with Thunderbird. I could open new messages with just a single click. For some reason this has changed to me needing to double click to open new messages.

I don't know why and cannot find any method of changing the software back to single click operation. It is only affecting Thunderbird all the Windows operations still operate with one click.

Can you advise me on how to reset the Thunderbird software to single click operation.

Many thanks. Alan Tierney

Open 6 10

When I first start up my laptop and open the Firefox browser, I see a notification that an un-authorization exception has occurred.

I used to ignore these, but today I clicked through to see the extended code and it looks like the unauthorization was to log into my bank account at CHASE, which is conc… (читать ещё)

I used to ignore these, but today I clicked through to see the extended code and it looks like the unauthorization was to log into my bank account at CHASE, which is concerning. I have a separate login, not an automatic one. I someone trying to get into my bank account?

Open 10

Shows password of Firefox sync account is invalid, although I've never changed my password.

Hi Community, I wanted to send a link to my desktop pc and saw that I'm not longer logged in. So I wanted to login again with my same acount and the same password I alway… (читать ещё)

Hi Community, I wanted to send a link to my desktop pc and saw that I'm not longer logged in. So I wanted to login again with my same acount and the same password I always used. The login site of Firefox sync shows: Password is invalid, but I never changed my password!

Now on my desktop pc (still logged in) I can't set a new password because there aswell my old password says 'Password is invalid'. Whar happend? Also to set a recovery key I need the old password aswell.

What to do? Greetings Ben

Open 10