Firefox does not open Windows - intermittent - 10 pro

Once I click on the icon to launch the Firefox browser I momentarily have the little blue icon of waiting... then nothing.
I can use everything on the computer, including the border, IE, Chrome, and Safari.

If I go to Task Manager it shows Firefox without activity. I can summon a number of instances of Firefox all do the same thing... nothing.

If I finish all instances of Firefox in the Task Manager, then try to run Firefox again once it opens and works normally. I can run a number of instances, and they work as they should.

If I normally close all instances of Firefox, they may or may not work the next time I try to run Firefox (intermittent). If the browser does not, I repeat the closing the Firefox process in the Task Manager and then reopening it... It will work then.

I tried to do a clean install of Firefox without success. The same problem.
The new installation of Windows 10 pro (64-bit)

I have another laptop with Windows 10 with the same Firefox addons and same imported bookmarks etc. It works very well.

This is puzzling?? Any suggestions would be appreciated.

Thank you
Peter

Hi Fred,.

Thanks for your quick response. I tried your suggestion, but it did not work, but you got me thinking... Thank you.

What I did... I uninstalled Firefox and then deleted all the references in the window registry related to Firefox.
Then, I put the edge as default browser, restarted.
I then downloaded and did a new install of Firefox and set it as my default browser.
Rebooted just to be sure.

Yay! It works now.

Tags: Firefox

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