Where is the source code of Firefox extensions?

On addons.mozilla.org there are lots of extension which says that source code is licensed under MPL,GPL for its license but if there was no extension support pages, home pages, etc.
So where is the source code you can see ?
I understand they are somewhere on the addons.mozilla.org but where ?
July 9th 19 at 11:01
2 answers
July 9th 19 at 11:03
File .xpi is a ZIP archive, it the source.
and download it as xpi file? - danika72 commented on July 9th 19 at 11:06
July 9th 19 at 11:05
Inside the XPI file
Comments and documentation ? - danika72 commented on July 9th 19 at 11:08

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