I suggest we go through the [tag:extension] tag and disambiguate it.

- Move all browser-extension related questions to:
 - [tag:google-chrome-extensions]
 - [tag:firefox-extensions]
 - [tag:safari-extensions]
 - *et cetera*
- Create [tag:internet-explorer-extensions] in that process.
- Move all file extension questions to [tag:file-extension].

Anything that's left after cleanup should possibly have the tag removed, because if you're asking for extensions for *X*, it should be enough to just tag it *X*.

If there's enough agreement on that, let's go through that list and clean it up step by step.