Firefox's own about:license page (reachable through the about firefox dialog) says the sources are available under a wide variety of open source licenses. Does that mean only Mozilla distributed binaries are governed by the "Firefox Terms of Use"? If I download Firefox through my distro package manager, and the distro infrastructure compiled and distributed it undet the terms of the open source licenses, presumably I…
"Mozilla" & "Firefox" are trademarks which would come with their own legalese I’m sure, and of course there are some services used by Firefox (the Mozilla addons store, the malware blacklists managed by Google IIRC, etc.) that would still require legal statements even for distro or other 3rd party builds.
[1]: https://www.mozilla.org/en-US/foundation/trademarks/distribu...
[2]: https://www.mozilla.org/en-US/foundation/trademarks/policy/