Almost all of the questions tagged with mozilla are questions about Firefox or Thunderbird, for example:
I don't think Firefox-related questions should include the mozilla tag, because from reading the tag description it seems to me that it should be used for general questions about the Mozilla foundation or Mozilla products in general:
Mozilla is a suite of Internet free and multiplatform applications whose components include a browser, an email client, an HTML editor and an IRC chat client.
Should I go over questions like these and retag them? Maybe we should add
"Do not use for product-specific questions such as Firefox or Thunderbird" in the tag description?
There are some questions that should be tagged with mozilla, like these two:
So I can see why this tag can be useful.