Where are the Firefox extension sources?

Question

Mozilla Firefox

On addons.mozilla.org there are a lot of extensions under which it is written that the source code is distributed under the MPL, GPL with its own license, but if the extension does not have a support page, home page, etc.
So where can I see the source?
I understand they are somewhere on addons.mozilla.org but where?

Answer 1

The .xpi file is a ZIP archive, it contains the source files.

Answer 2

Inside the XPI file

Answer 3

Personally, I found .xpi extension files in the path C:\Users\my username\AppData\Roaming\Mozilla\Firefox\Profiles\gxh3vhtp.default-release\extensions
And I didn't run into the problem of naming these .xpi files because in the file C:\Users\my username\AppData\Roaming\Mozilla\Firefox\Profiles\gxh3vhtp.default-release\extensions.json you can look at the path to a specific extension