http://kb.mozillazine.org/The_page_isn't_redirecting_properly Not Redirecting properly = cookies

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

@FredMcD - Thanks for responding. Unfortunately, none of these suggestions fixed the problem.

As noted, I deleted the entire Mozilla program and profile(s) completely before writing my initial post. So there are no Add-Ons, zero cookies, zero cache, etc.

From your reply, I also tried disabling hardware acceleration, as you suggested. That didn't work either.

So to Recap;

• I deleted all traces of previous version(s) of Firefox.

• I located all previous profiles and deleted them entirely:

Help > Troubleshooting > Profile folder > Open Folder ... took me to a folder located in: C:\Users\%UserName%\AppData\Roaming\Mozilla\Firefox\Profiles\%xyz%.default

• I deleted the entire Mozilla profile(s) folder, located:

"C:\Users\%UserName%\AppData\Roaming\Mozilla" & "C:\Users\%UserName%\AppData\Local\Mozilla" Without any program or profile folders left, there remain zero Add-Ons, zero cookies, zero cache, etc.

I tried with the current latest version of Firefox and with Firefox ESR.

I currently have the latest ESR installed: Firefox 68.2.0esr

Unfortunately, the problem persists. Perhaps it is some dependency embedded in Firefox.

Tried with hardware acceleration disabled & Firefox in Safe Mode

Do you use a bookmark or are you starting with the main (home) page of this website?

if you use a bookmark to access a specific page then instead navigate to this page starting with the main page or the sign in page in case there is a problem with this bookmark.

You can try to enable third-party cookies temporarily in case you are currently blocking some cookies.

• Options/Preferences -> Privacy & Security

Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.

• https://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• https://www.7tutorials.com/4-ways-boot-safe-mode-windows-10

No bookmark used.

The problem resolved itself after I reinstalling the Operating System.

However, I installed Google Chrome after Firefox starting having issues and Google Chrome never had any issues.