Reload the webpage while bypassing the cache
- Hold down the Shift key and click the Reload button with a left click.
- Press Ctrl + F5 or Ctrl + Shift + R (Windows and Linux)
- Press Command + Shift + R (Mac)
Clear the cache and the cookies from sites that cause problems.
Clear the Cache: Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
Remove Cookies from sites causing problems:
- Tools > Options > Privacy > Cookies: "Show Cookies"
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Start Firefox in Safe Mode to Troubleshoot the issue and to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
Reload the webpage while bypassing the cache
*Hold down the ''Shift'' key and click the ''Reload'' button with a left click.
*Press ''Ctrl'' + ''F5'' or ''Ctrl'' + ''Shift'' + ''R'' (Windows and Linux)
*Press ''Command'' + ''Shift'' + ''R'' (Mac)
Clear the cache and the cookies from sites that cause problems.
'''Clear the Cache''': Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
'''Remove Cookies''' from sites causing problems:
*Tools > Options > Privacy > Cookies: "Show Cookies"
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Start Firefox in [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Safe Mode to Troubleshoot the issue] and to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
* https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes