Garmin Communicator Plugin works on browsers - it lets you get data from Garmin GPS devices. This can be used to send your training data to the Garmin Connect website. The application lets you update the map database on the hardware. If you are a developer, you can get the Communicator API to make use of these features in your website.
The WOT add-on is a crowd-sourced enhancement to your browser protection
It is a browser add-on which lets you search via your favorite search engine
