If you just want to clear the Firefox cache, see How to clear the Firefox cache. To clear your browsing history, cookies and temporarily cached files at once, see Delete browsing, search and download history on Firefox. To prevent websites from storing cookies on your computer, see Block websites from storing cookies and site data in Firefox. What's stored in your Firefox history? There are various types of data in your Firefox history, and they all do different things. That means each one will have a different effect if you delete it. These are types of data you can remove from your browsing history in Firefox: Browsing and download history. Alternatively, you can go to ☰ > History > Clear Recent History and select "Everything" from the "Time range to clear" drop-down menu. Finally, make sure you've selected Cache and click Ok. On Windows and Mac computers, you can also press the keyboard shortcut Ctrl + Alt + Delete to open the menu in Cookies and Site Data. Type about:config in the address bar and press Enter Return. A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.; In the Search preference name box at the top type browser.sessionstore.resume_from_crash.; Click the Toggle button next to browser.sessionstore.resume_from_crash to set it to false.; Troubleshooting Previous session not correctly closed Can't delete history in Firefox 8.0. User Help for Mozilla Firefox. 9 posts • Page 1 of 1. BrooksNYC Posts: 79 Joined: April 13th, 2006, 1:27 am. Posted November 26th, 2011, 6:47 pm. Howdy. I was surprised to discover today that Firefox 8.0 has saved several weeks' worth of browsing history, as revealed when I open the History pane: Finding your profile without opening Firefox. Firefox stores your profile folder in this location on your computer, by default: C:\Users\\AppData\Roaming\Mozilla\Firefox\Profiles\. Windows hides the AppData folder by default but you can find your profile folder as follows: Press + R on the keyboard. Use the following steps to delete Edge browsing history in Chrome; Open Command Prompt as an administrator. When you get the User Account Control message, click Yes to continue. To delete internet This will not change your profile data or add-ons. Click the menu button , click Help and select More Troubleshooting Information. The Troubleshooting Information page will open. Under Try clearing the startup cache, click Clear startup cache… and then click Restart . 3. Restart Firefox in Troubleshoot Mode. pAKl.