T-mobile
Slow response when accessing t-mobile.com and when trying to log in goes to error page. This goes back several months. Both Windows 10 and Firefox are regularly updated. Edge browser for one does not have this problem.
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Please explain the problem in detail. What happens? What is/are the exact error message(s) ?
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.
- 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}