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Firefox fails to start even after reinstall

On one computer I have deleted everything from Firefox including the folders within Apps Roaming except for one folder. There in one folder "41A66E7EE5E1" within Profile… (read more)

On one computer I have deleted everything from Firefox including the folders within Apps Roaming except for one folder. There in one folder "41A66E7EE5E1" within Profiles which I cannot delete. It holds the files prefs.js and sessionCheckpoints.json which were created at 20/02/2021 and I cannot delete those.

My new installation is dated 24/07/2021.

There is nothing in the properties of those two files to suggest an issue. I do find however that when I seek to change the Property/Security to Administrator (I should be able to do that) I receive a dialog box that "the file or directory is corrupted and unreadable".

Please advise on how I address this.

Asked by brijohnnow 21 hours ago

Answered by brijohnnow 4 hours ago

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Firefox won't respond on my Mac.

I have the 13" MacBook Pro, which is currently on macOS 11.4. I only downloaded Firefox today but the application won't respond when I open it; I can't use the app. … (read more)

I have the 13" MacBook Pro, which is currently on macOS 11.4.

I only downloaded Firefox today but the application won't respond when I open it; I can't use the app.

Asked by youngautumn 1 day ago

Answered by cor-el 1 day ago

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Firefox doesnt work and any page cannot be opened

i was clearing my PC from unused programs apps and i deleted files named on MICROSOFT VISUAL And anything stop loading please help me fix the problem i have dark theme an… (read more)

i was clearing my PC from unused programs apps and i deleted files named on MICROSOFT VISUAL And anything stop loading please help me fix the problem

i have dark theme and when i typing anything in search the page is basic dark and nothing appears

Asked by shiyanartur2007 1 day ago

Answered by FredMcD 1 day ago

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installed new Windows 10 update Now firefox icon leads me to Bing "settings" option claims Firefox is default browser but it isnt

installed new Windows 10 update Now Firefox icon leads me to Bing "settings" option claims Firefox is default browser but it isnt duplicate. https://support.mozilla.org… (read more)

installed new Windows 10 update Now Firefox icon leads me to Bing "settings" option claims Firefox is default browser but it isnt

duplicate. https://support.mozilla.org/en-US/questions/1343911

Asked by Don Scott 1 week ago

  • Solved

Nightly updates everytime I open it

1. Whenever I boot my laptop, FIrefox is always downloading an update and it is always the same version i.e. 91.0a1 (2021-07-06) (64-bit) 2. I do not know if it is yyyy.m… (read more)

1. Whenever I boot my laptop, FIrefox is always downloading an update and it is always the same version i.e. 91.0a1 (2021-07-06) (64-bit)

2. I do not know if it is yyyy.mm.dd or yyyy.dd.mm

Asked by Amay 2 weeks ago

Answered by cor-el 2 weeks ago

  • Solved

"Update Available" message keeps popping up.

Does the "Update Available" popup screen shown in the uploaded image come from Firefox? It keeps coming back it seems every time I open Firefox. I clicked "Update" a few … (read more)

Does the "Update Available" popup screen shown in the uploaded image come from Firefox? It keeps coming back it seems every time I open Firefox. I clicked "Update" a few times, but Firefox never got updated, as far as I can tell. I tried turning off NordVPN but that does not allow an update to occur. Now I just click "Dismiss" if I need to see what's behind the popup. You have to click either "Update" or Dismiss" to get it to go away. There is no "x" at the upper right on the popup screen, which would allow you to close the screen without clicking either "Update" or "Dismiss". I worry that by clicking on either I am downloading some malware. William F Briel

Asked by wfpb94 3 weeks ago

Answered by FredMcD 2 weeks ago

  • Solved

Firefox wont load pages, Get VCRUNTIME140_1.dll Not Found Errors

I got a new Lenovo Laptop and cant get Firefox to load a webpage. Here's what happens and what I've done 1. I install Firefox and during install get error below, VCRUNTI… (read more)

I got a new Lenovo Laptop and cant get Firefox to load a webpage. Here's what happens and what I've done 1. I install Firefox and during install get error below, VCRUNTIME140_1.dll Not Found. I then click OK and Firefox Installs but when I load it no webpages will come up just a black screen no indications it is even trying to load the page, no error message. It does nothing. Cant even open Google.com 2. I looked in MS forums and they say to install Visual C++. Did every x86 and X64 version I could find. Still have the problem even after uninstalling Firefox and reboot. 3 Have McAfee, and took Firefox off the Safe list then put it back on. 4. Went to try and find the file but can't on a reputable website. So I looked for this file on my Dell Laptop and Asus Desktop. Both have Firefox installed and it works fine. Get this, NONE of my other two computers have that exact file name anywhere. VCRUNTIME140_1.DLL! They have 140.DLL and a few other 140.dll with different variation but no 140_1.dll? So how does Firefox run on 2 other computers without this DLL but not on this new one? They are all Windows 10 Would appreciate any help. Seems to be a Firefox or Lenovo Issue just not sure. If anyone know how to get the DLL from MS let me know.

Asked by Mark M 3 weeks ago

Answered by cor-el 3 weeks ago

  • Solved

installing newest firefox on linux mint

I am using Linux Mint 6.0.3.1 , and my Mozilla Firefox version is 77.0.1 . My Firefox will not update, neither automatically nor when prompted. When I go to all the pag… (read more)

I am using Linux Mint 6.0.3.1 , and my Mozilla Firefox version is 77.0.1 . My Firefox will not update, neither automatically nor when prompted. When I go to all the pages for downloading and installing the newest Firefox, I am always able to download a package, which appears as a folder labeled " firefox-89.0.2.tar.bz2 " but then I cannot install it, it just appears as a folder full of files that will not run. I have tried following the command lines in the terminal that these pages claim will make the new version run, but I always just get a response like "no such command" or "no file exists." Shouldn't there be some relatively simple and reliable path to just get firefox 89 onto my computer?

Asked by samuel.biagetti 3 weeks ago

Answered by cor-el 3 weeks ago

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upgrading Firefox browser then imporrting old version's bookmarks

I now have two versions of Firefox Browser installed. the new version allows me to import bookmarks from Edge and Chrome, but not from the old Firefox. how can I do tha… (read more)

I now have two versions of Firefox Browser installed. the new version allows me to import bookmarks from Edge and Chrome, but not from the old Firefox. how can I do that please? thanks, all. bob oh, I am on windows 8.1 and FF 89.0

Asked by robert.d.sommer 3 weeks ago

Answered by robert.d.sommer 3 weeks ago

  • Solved

Open Tabs drop-down missing after upgrade

I just upgraded to Firefox 89.0.2 from a very old version of Firefox and noticed that the Open Tabs drop-down is missing. This is the symbol that appeared on the far rig… (read more)

I just upgraded to Firefox 89.0.2 from a very old version of Firefox and noticed that the Open Tabs drop-down is missing. This is the symbol that appeared on the far right end of the open tabs that allowed me to see all of the open tabs in a drop down list with the entire tab name showing. How can I get this back?

Asked by caryr 3 weeks ago

Answered by cor-el 3 weeks ago

  • Solved

[Firefox 89] Unusable after Update due to Large Blank Rectangle on Top of Websites

System Elementary OS 5.1 (Ubuntu 18.04) Nvidia 465 driver Tried with Firefox from Ubuntu repos and Flathub Problem Since the update, I have this rectangle (see picture) o… (read more)

System Elementary OS 5.1 (Ubuntu 18.04) Nvidia 465 driver

Tried with Firefox from Ubuntu repos and Flathub

Problem Since the update, I have this rectangle (see picture) on all websites, even the settings. This makes Firefox unusable.

What I already tried

  1. Numbered list item Started Firefox in Troubleshoot-Mode, where everything works normal. Nice.
  2. Numbered list item EDIT: I also tried the "Refresh Firefox" option, with no success
  3. Numbered list item I purged the Firefox install and removed all configs, addons etc. on disk (removed /usr/lib/mozilla, ~/.mozilla, /etc/firefox). Sadly, the Problem is still there.

So it works in Troubleshoot-Mode with my personalized Firefox version as well as a clean install, but never outside of Troubleshoot-Mode.

Question As a clean Firefox (see above) seems to work as intended, how do I reproduce this behavior outside of Troubleshoot-Mode? What changes between Troubleshoot-Mode and regular mode? Any advice?

Asked by Jo 1 month ago

Answered by FredMcD 1 month ago