Where should the extension tag be used?

Does it refer to browser extensions?

This question has both google-chrome-extensions and extension tags, and this question has both firefox-extensions and extension tags.

Is there a unique use of the extension tag? Is it specifiaclly for Internet Explorer because there is no internet-explorer-extensions tag?

Where should the extension tag be used?

Does it refer to browser extensions?

This question has both google-chrome-extensions and extension tags, and this question has both firefox-extensions and extension tags.

Is there a unique use of the extension tag? Is it specifiaclly for Internet Explorer because there is no internet-explorer-extensions tag?