Good question. Everything is in firefox and open source Here are the bugs: https://bugzilla.mozilla.org/buglist.cgi?cmdtype=runnamed&namedcmd=WebReplay https:

Good question. Everything is in firefox and open source Here are the bugs: https://bugzilla.mozilla.org/buglist.cgi?cmdtype=runnamed&namedcmd=WebReplay https://bugzilla.mozilla.org/buglist.cgi?cmdtype=runnamed&na... Here's the primary directory: https://searchfox.org/mozilla-central/source/toolkit/recordreplay https://searchfox.org/mozilla-central/source/toolkit/recordr... The debugger API is implemented in JS here https://searchfox.org/mozilla-central/source/devtools/server/actors/replay/debugger.js https://searchfox.org/mozilla-central/source/devtools/server...