Try this methods to fix - 1. Restart your computer Sometimes problems can be fixed by simply restarting your computer and then starting Firefox again. 2. Clear your cookies and cache Many problems with loading web pages can be resolved by clearing Firefox's cookies and cached Web content. To learn more, see Clear cookies and site data in Firefox and How to clear the Firefox cache. To clear cookies and cache all at once: Click the menu button Fx89menuButton to open the menu panel. Click History and select Clear Recent History… In the Time Range to clear: drop-down, select Everything. Below the drop-down menu, select both Cookies and Cache. Make sure other items you want to keep are not selected. Click OK. Firefox also has a startup cache that stores certain temporary data, to improve startup speed. Clearing the startup cache and then restarting Firefox can resolve various issues with the Firefox user interface (UI). This will not change your profile data or add-ons. Click the menu button Fx89menuButton, 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 Firefox Troubleshoot Mode is a diagnostic mode that disables extensions, uses the default theme, turns off hardware acceleration and uses default toolbar settings, among other changes (see this article for details). To start Firefox in Troubleshoot Mode: Click the menu button Fx89menuButton, click Help, select Troubleshoot Mode… and click Restart in the Restart Firefox in Troubleshoot Mode? dialog. Note: You can also start Firefox in Troubleshoot Mode by holding down the Shift key while starting Firefox. In the next Open Firefox in Troubleshoot Mode? dialog, click Open. Check whether your problem is still happening while in Troubleshoot Mode. If the problem still happens in Troubleshoot Mode, go on to step 4. If the problem does not happen in Troubleshoot Mode, follow these instructions to troubleshoot extensions, themes and hardware acceleration. 4. Reinstall Firefox Some Firefox issues can be caused by a problem with one of the Firefox program files. Follow these steps to completely remove and reinstall Firefox. This process will not remove your Firefox profile data (such as bookmarks and passwords), since that information is stored in a different location. Note: You might want to print these steps or view them in another browser. Download and save the installer for the latest official version of Firefox from mozilla. Exit Firefox (if open): Click the Firefox menu Fx89menuButton and select Exit. You may want to make a note of the Mozilla Firefox program folder location (right-click the Firefox desktop icon, select Properties from the context menu and click the Shortcut tab) since there may be leftover files and folders after you uninstall Firefox that should be removed for a clean reinstallation. Uninstall Firefox from your computer. Delete the Firefox program folder, which is normally found in one of these locations by default: C:\Program Files\Mozilla Firefox C:\Program Files (x86)\Mozilla Firefox Reinstall Firefox using the installer you downloaded earlier - see How to install Firefox on Windows for instructions. Now start Firefox and check to see if your problem has been fixed. If it hasn't, continue with the next troubleshooting method. 5. Refresh Firefox The Refresh Firefox feature can fix many issues by restoring your Firefox profile to its default state while saving your essential information. If you have many Firefox customizations, you may want to skip this step and create a new Firefox profile instead (see step 6, below) so that your old profile is easily recoverable from the Profile Manager. Note: When you refresh Firefox, your bookmarks, browsing history, open tabs, windows, passwords, cookies and web form auto-fill information will be saved. However, your extensions and themes will be removed and your preferences will be reset. Learn more. Click the menu button Fx89menuButton, click Help and select More Troubleshooting Information. Click Refresh Firefox… then Refresh Firefox in the confirmation window that opens. Firefox will close to refresh itself. When finished, a window will list your imported information. Click the Finish button. Firefox will open. Select whether you want Firefox to restore all or some windows and tabs and click the Let's go! button. Note: There's a Refresh Firefox button in the Firefox Troubleshoot Mode window, if you can't start Firefox normally. You can also do a manual refresh by creating a new profile and transferring your important data to the new profile. Greeting, Rachel Gomez