One of the reasons behind Firefox's sustained popularity is the availability of a vast library of extensions. But expanding functionality through these add-ons can have some downsides of their own. For example, most of them are not cross-platform, so if you decide to try another browser your favorite extensions might not be available.
From a simple “mail page to” script to a spelling checker to an HTML debugger, all you need to do to enable them is drag a link to your favorites – typically your bookmarks toolbar – and that’s that.
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