You can try these steps in case of issues with webpages: You can reload webpage(s) and bypass the ca

You can try these steps in case of issues with webpages:

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

hold down the Shift key and left-click the Reload button

press "Ctrl+F5" or press "Ctrl+Shift+R" (Windows,Linux)

press "Command+Shift+R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings), click the padlock icon (Clear cookies and site data) for the domain in the selected tab.

"Remove the Cookies" for websites that cause problems:

Settings -> Privacy & Security
Cookies and Site Data: "Manage Data"

"Clear the Cache":

Settings -> Privacy & Security
Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox

https://support.mozilla.org/en-US/kb/how-clear-firefox-cache

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes

do NOT click "Refresh Firefox" in the Troubleshoot Mode start window

https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode

https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

You can check for issues with Enhanced Tracking Protection and Total Cookie Protection. Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages like about blocked content.

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop

https://support.mozilla.org/en-US/kb/total-cookie-protection-and-website-breakage-faq

https://support.mozilla.org/en-US/kb/trackers-and-scripts-firefox-blocks-enhanced-track