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Firefox disappearing after reboot

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Good evening. I have recently broken my laptop screen, and I was able to transfer my profile onto my work laptop, on which I have just installed Firefox (84.0, Windows 10). After installation, I was able to retrieve open tabs, bookmarks etc. although, whenever I turn off and on the laptop, I can use firefox for like a minute, then the firefox icon on the desktop disappears and the program gets killed. Firefox is installed though, because I can retrieve it from search, but when I click on the app, it doesn't open the usual tabs I have opened, but instead tries to load an empty page with a message underneath that says that I should connect to a network. Reinstalling Firefox fixes the issue for me, but it's a temporary fix. Is there any way I could make this permanent? I should reinstate that this is a company laptop, obviously I am authorised to use it for personal use, but it might be something to do with that.

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This is about network detection done by Firefox on startup. See Network Detection:

You can set this pref to false on the about:config page to disable this feature if you do not need it.

  • network.captive-portal-service.enabled = false

You can open the about:config page via the location/address bar. You can click the button to "Accept the Risk and Continue".

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Thank you for your reply. Unfortunately, after having set it to false, it didn't fix the issue. The icon still disappears after a couple of minutes from booting. Is there any other parameter that might cause it? Thank you very much.

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There was a bug report about this issue a while back, but that should have been fixed in Firefox 84+ and Firefox 78.6 ESR.

  • Bug 1666072 - "you must log in to this network before you can access the internet"

You can check if firefox.com:HSTS is in SiteSecurityServiceState.txt in the profile folder and possibly remove this line.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

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Good evening, Thank you for your quick reply. The line isn't in SiteSecurityServiceState.txt, unfortunately, so I cannot remove it. I am not sure where does this leave us, but I am really glad for your efforts.

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