Think of everytime you perform a search within a webpage: you get a list of results, you visit some of them, and over time your history gets cluttered with many URLs that point to the search page, not only to the results. Reaser removes those URLs, all without user intervention.
- Removed "search" permission as it's not used at the moment - Track already existing tabs when the addon is loaded for the first time (e.g. when installing it from AMO) - Minor code cleanups
