In certain situations, you might want to completely refresh or rest your browser to default rather than just delete browsing history and cookies from it. For instance, if your browser crashes or feels slow after installing a plugin, or wants to remove toolbars that are installed without your knowledge, you need to reset your browser. Here is how to reset your Internet Explorer, Firefox and Chrome in Windows.
Internet Explorer: To reset Internet Explorer, go to Tools – Internet Options and click the “Advanced” tab.
Click the “Reset” button under “Reset Internet Explorer Settings”, then select “Delete Personal Settings” and click “Reset”. Restart your PC for the changes to take effect.
Firefox: To reset Firefox, click Firefox button, go to Help and select “Troubleshooting Information”. Click the “Reset Firefox” button, when asked confirm, click Reset Firefox again.
Go back to the “Troubleshooting Information” page and click “Show Folder” in the Profile Folder.
When the Profile window opens, close Firefox then find and delete the file “prefs.js”. Close the folder and restart Firefox for a fresh version.
Find the file called “Default” and rename it (for instance, “old-default”). Then launch Chrome and a new “Default” file will be created, so you can have afresh Chrome.
Alternatively, you can use Chrome Eraser, a free utility that can reset the Chrome browser to default.