UrlbarExt is an experimental Firefox add-on that adds a few interesting functions to the Firefox location bar. Users who do not have an account but would like to install the add-on could use one of the available logins from Bugmenot It adds six new icons to the right side of the Firefox location bar which look a lot like the icons that the Tagmarks extension is adding in that place. Users with the Tagmarks extension enabled might run into troubles. This has not been tested and is just an assumption.
The icons provide easy access to the following functions:
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