Many site issues can be caused by corrupt cookies or cache.
Clear the Cache and
Remove Cookies
Warning ! ! This will log you out of sites you're
logged in to. You may also lose any settings
for that website.
Type about:preferences<enter> in the address bar.
Cookies; Select Privacy. Under History, select
Firefox will Use Custom Settings. Press the button
on the right side called Show Cookies. Use the
search bar to look for the site.
Note; There may be more than one entry.
Remove All of them.
Cache; Select Advanced > Network. Across from
Cached Web Content, Press Clear Now.
If there is still a problem,
Start Firefox in Safe Mode {web link}
A small dialog should appear. Click Start In Safe Mode (not Refresh).
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.
You will need to restart Firefox for this to take effect so save all work first (e.g., mail you are composing, online documents you're editing, etc.,) and then perform these steps:
In Firefox 54 and below:
Click the menu button and select Options (Windows) or Preferences (Mac, Linux).
Select the Advanced panel and the General tab.
Uncheck Use hardware acceleration when available.
Close Firefox completely and then restart Firefox to see if the problem persists.
In Firefox 55 and above:
Click the menu button and select Options (Windows) or Preferences (Mac, Linux).
Select the General panel.
Under Performance, uncheck Use recommended performance settings. Additional settings will be displayed.
Uncheck Use hardware acceleration when available.
Close Firefox completely and then restart Firefox to see if the problem persists.
Did this fix your problems? Please report back to us!
If the problem is resolved, you should check for updates for your graphics driver by following the steps mentioned in these Knowledge base articles:
Many site issues can be caused by corrupt cookies or cache.
* Clear the Cache and
* Remove Cookies
'''Warning ! ! ''' This will log you out of sites you're
logged in to. You may also lose any settings
for that website.
Type '''about:preferences'''<enter> in the address bar.
* '''Cookies; ''' Select '''Privacy. ''' Under '''History, ''' select
Firefox will '''Use Custom Settings. ''' Press the button
on the right side called '''Show Cookies. ''' Use the
search bar to look for the site.
Note; There may be more than one entry.
Remove '''All''' of them.
* '''Cache; ''' Select '''Advanced > Network. ''' Across from
'''Cached Web Content, ''' Press '''Clear Now. '''
If there is still a problem,
'''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link}
A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh).
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.
You will need to restart Firefox for this to take effect so save all work first (e.g., mail you are composing, online documents you're editing, etc.,) and then perform these steps:
'''In Firefox 54 and below:'''
# Click the menu button [[Image:New Fx Menu]] and select ''Options'' (Windows) or ''Preferences'' (Mac, Linux).
# Select the ''Advanced'' panel and the ''General'' tab.
# Uncheck '''Use hardware acceleration when available'''.
# Close Firefox completely and then restart Firefox to see if the problem persists.
'''In Firefox 55 and above''':
# Click the menu button [[Image:New Fx Menu]] and select ''Options'' (Windows) or ''Preferences'' (Mac, Linux).
# Select the ''General'' panel.
# Under '''Performance''', uncheck ''Use recommended performance settings''. Additional settings will be displayed.
#;[[Image:Fx55Performance-disableHWA|width=500]]
# Uncheck '''Use hardware acceleration when available'''.
# Close Firefox completely and then restart Firefox to see if the problem persists.
Did this fix your problems? Please report back to us!
If the problem is resolved, you should check for updates for your graphics driver by following the steps mentioned in these Knowledge base articles:
* [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems#w_turn-off-hardware-acceleration]]
* [[Upgrade your graphics drivers to use hardware acceleration and WebGL]]
and select Options (Windows) or Preferences (Mac, Linux).
