You need to close (Quit/Exit) and restart Firefox when you create or modify the userContent.css file. To avoid this you need to make sure to select 'All files' in the dialog to save the file in the text editor using 'Save File as'. txt file extension and you end up with a file named. In Windows saving the file is usually the only time things get more complicated because Windows can silently add a. In this userContent.css text file you paste the text posted.

In the chrome folder you need to create a plain text file with the name userContent.css (name is case sensitive). You need to create a folder with the name chrome in this folder (name is all lowercase). If you click this button then you open the profile folder in the Windows File Explorer. You can find this button under the 'Application Basics' section as 'Profile Folder -> Open Folder'. The first step is to open the 'Help -> Troubleshooting Information' page and find the button to access the profile folder. It is not that difficult to create userContent.css if you have never used it. This is named scroll-up-header and it only appears when you scroll up, as soon as you scroll down it will disappear. *do NOT click the 'Refresh Firefox' button on the Safe Mode start window *switch to the DEFAULT theme: '3-bar' menu button or Tools -> Add-ons -> Themes *Options/Preferences -> Privacy & Securit圜ookies and Site Data -> Clear Data -> Cached Web Content: Clear

*Options/Preferences -> Privacy & Securit圜ookies and Site Data: 'Manage Data' *press 'Ctrl + F5' or press 'Ctrl + Shift + R' (Windows,Linux)

*hold down the Shift key and left-click the Reload button *use a compressed image type like PNG or JPG to save the screenshot do NOT click the 'Refresh Firefox' button on the Safe Mode start window.switch to the DEFAULT theme: '3-bar' menu button or Tools -> Add-ons -> Themes.Start Firefox in Safe Mode to check if one of the extensions ('3-bar' menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem. Options/Preferences -> Privacy & SecurityĬookies and Site Data -> Clear Data -> Cached Web Content: Clear.'Remove the Cookies' for websites that cause problems: press 'Ctrl + F5' or press 'Ctrl + Shift + R' (Windows,Linux)Ĭlear the Cache and remove the Cookies for websites that cause problems via the '3-bar' Firefox menu button (Options/Preferences).hold down the Shift key and left-click the Reload button.You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files. You can try these steps in case of issues with web pages: use a compressed image type like PNG or JPG to save the screenshot.

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