I\'m working on a browser extension that adds it\'s UI to the pages DOM. On some pages I have the problem certain styles affect my UI. To counter this I keep my UI underneat
I recommend using a quick Google search to find something like so: http://meyerweb.com/eric/tools/css/reset/
You can implement the reset in as-is and then if any problems arise down the road, simply add to it as needed.
Be aware that some pre-made CSS resets require a shout-out to using them.