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The browser doesn't appear but works in the background when i open Task Manager ?

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i have windows 10 x64

when i click on firefox icon it's run on task manager and uses CPU but doesn't appear i got this issues after the latest update

i can't uninstall it because i have important sites and blogs in bookmarks

i have windows 10 x64 when i click on firefox icon it's run on task manager and uses CPU but doesn't appear i got this issues after the latest update i can't uninstall it because i have important sites and blogs in bookmarks

Chosen solution

One new thing in Firefox 66 is that it converts data stored by extensions to a new format, IndexedDB. If you have a lot of extensions, this could take some time, but I suspect you have allowed quite a bit of time already in your testing (i.e., not killing the Firefox process too quickly).

Could you try:

New Profile Test

This takes about 3 minutes, plus the time to test your problem site(s).

Inside Firefox, type or paste about:profiles in the address bar and press Enter/Return to load it.

Click the Create a New Profile button, then click Next. Assign a name like April2019, ignore the option to relocate the profile folder, and click the Finish button.

After creating the profile, scroll down to it and click the Set as default profile button below that profile, then scroll back up and click the Restart normally button. (There are some other buttons, but please ignore them.)

Firefox should exit and then start up using the new profile, which will just look brand new. So far so good?

If you have set up Firefox Sync, you could try connecting to your Firefox Account to restore data, but you might want to back up your bookmarks first. Steps for that will be after the line below.

When you are done with the experiment, you can open the about:profiles page again, click the Set as default profile button for your normal profile, then click the Restart normally button to get back to it.


Backing up Bookmarks When Firefox Won't Run Your Profile

While you are in the test profile, call up the about:profiles page and look for your regular profile. On the "Root Directory" line, click the Open Folder button. Here, double-click into the bookmarkbackups folder and copy several recent files to a safe place such as your Documents folder. Note that these compressed files aren't readable in other programs, but you can look at the file names to see the date they were made and the number of items (bookmarks + folders) to get a quick sense of whether they have your stuff.

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Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36

More Information

jscher2000
  • Top 10 Contributor
8498 solutions 69429 answers

Hi nasheet, thank you for the detailed report. A couple of questions:

(1) Have you already done a normal shutdown and restart of Windows since this problem started? If not, please try that.

(2) Do you get a Firefox button on the Windows Taskbar? If you do, is there a little thumbnail image of your home page when you hover over it?

If you have the thumbnail image but can't get Firefox on screen, please see this post: https://support.mozilla.org/questions/1255009#answer-1210340

(3) When you check Task Manager, do you have just one Firefox process? Normally there are a few.

Something may be preventing Firefox from fully starting up, but some guesswork is involved in tracking it down. One thing that can happen after an update is an issue with security software. For that, see: Configure firewalls so that Firefox can access the Internet.

Any progress so far?

Hi nasheet, thank you for the detailed report. A couple of questions: (1) Have you already done a normal shutdown and restart of Windows since this problem started? If not, please try that. (2) Do you get a Firefox button on the Windows Taskbar? If you do, is there a little thumbnail image of your home page when you hover over it? ''If you have the thumbnail image but can't get Firefox on screen, please see this post:'' https://support.mozilla.org/questions/1255009#answer-1210340 (3) When you check Task Manager, do you have just one Firefox process? Normally there are a few. Something may be preventing Firefox from fully starting up, but some guesswork is involved in tracking it down. One thing that can happen after an update is an issue with security software. For that, see: [[Configure firewalls so that Firefox can access the Internet]]. Any progress so far?
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Question owner

(1) yes (2) i haven't Firefox button on taskbar (3) i have just one Firefox process but uses 35% of my cpu

(1) yes (2) i haven't Firefox button on taskbar (3) i have just one Firefox process but uses 35% of my cpu
Was this helpful to you?
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jscher2000
  • Top 10 Contributor
8498 solutions 69429 answers

Chosen Solution

One new thing in Firefox 66 is that it converts data stored by extensions to a new format, IndexedDB. If you have a lot of extensions, this could take some time, but I suspect you have allowed quite a bit of time already in your testing (i.e., not killing the Firefox process too quickly).

Could you try:

New Profile Test

This takes about 3 minutes, plus the time to test your problem site(s).

Inside Firefox, type or paste about:profiles in the address bar and press Enter/Return to load it.

Click the Create a New Profile button, then click Next. Assign a name like April2019, ignore the option to relocate the profile folder, and click the Finish button.

After creating the profile, scroll down to it and click the Set as default profile button below that profile, then scroll back up and click the Restart normally button. (There are some other buttons, but please ignore them.)

Firefox should exit and then start up using the new profile, which will just look brand new. So far so good?

If you have set up Firefox Sync, you could try connecting to your Firefox Account to restore data, but you might want to back up your bookmarks first. Steps for that will be after the line below.

When you are done with the experiment, you can open the about:profiles page again, click the Set as default profile button for your normal profile, then click the Restart normally button to get back to it.


Backing up Bookmarks When Firefox Won't Run Your Profile

While you are in the test profile, call up the about:profiles page and look for your regular profile. On the "Root Directory" line, click the Open Folder button. Here, double-click into the bookmarkbackups folder and copy several recent files to a safe place such as your Documents folder. Note that these compressed files aren't readable in other programs, but you can look at the file names to see the date they were made and the number of items (bookmarks + folders) to get a quick sense of whether they have your stuff.

One new thing in Firefox 66 is that it converts data stored by extensions to a new format, IndexedDB. If you have a lot of extensions, this could take some time, but I suspect you have allowed quite a bit of time already in your testing (i.e., not killing the Firefox process too quickly). Could you try: '''New Profile Test''' This takes about 3 minutes, plus the time to test your problem site(s). Inside Firefox, type or paste '''about:profiles''' in the address bar and press Enter/Return to load it. Click the Create a New Profile button, then click Next. Assign a name like April2019, ignore the option to relocate the profile folder, and click the Finish button. After creating the profile, scroll down to it and click the '''Set as default profile''' button below that profile, then scroll back up and click the '''Restart normally''' button. (There are some other buttons, but please ignore them.) Firefox should exit and then start up using the new profile, which will just look brand new. So far so good? If you have set up Firefox Sync, you could try connecting to your Firefox Account to restore data, but you might want to back up your bookmarks first. Steps for that will be after the line below. When you are done with the experiment, you can open the about:profiles page again, click the '''Set as default profile''' button for your normal profile, then click the '''Restart normally''' button to get back to it. ---- '''Backing up Bookmarks When Firefox Won't Run Your Profile''' While you are in the test profile, call up the '''about:profiles''' page and look for your regular profile. On the "Root Directory" line, click the Open Folder button. Here, double-click into the '''bookmarkbackups''' folder and copy several recent files to a safe place such as your Documents folder. Note that these compressed files aren't readable in other programs, but you can look at the file names to see the date they were made and the number of items (bookmarks + folders) to get a quick sense of whether they have your stuff.
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Question owner

thank you i copied my bookmarks and reinstall firefox now is working and have restored my bookmarks

thank you i copied my bookmarks and reinstall firefox now is working and have restored my bookmarks
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