Try going into "Settings" and then "Apps". Go to "All" and then locate the browser you are looking for. Tap it and then tap "Clear Cache", next tap "Clear Data". Then restart (turn off and back on) the phone. It should work then.
NOTE: When you clear the data and cache for the browser, it will remove anything you have saved with that browser. So if there are addresses, passwords, log ins, etc. you need from it, save them first.