[tbb-bugs] #25020 [Applications/Tor Browser]: There should be an easy way to detect the version of an installed bundle.

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#25020: There should be an easy way to detect the version of an installed bundle.
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     Reporter:  yawning                   |      Owner:  tbb-team
         Type:  enhancement               |     Status:  new
     Priority:  Low                       |  Milestone:
    Component:  Applications/Tor Browser  |    Version:
     Severity:  Normal                    |   Keywords:  tbb-rbm
Actual Points:                            |  Parent ID:
       Points:                            |   Reviewer:
      Sponsor:                            |
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 For numerous reasons, it would be nice if there was a convenient way to
 detect the version of an installed bundle on disk, that does not involve
 launching Tor Browser.

 Historically there was a `versions` file deep within the guts of the
 bundle that could (and was) abused for this purpose, but with the move to
 rbm, the file no longer exists.

 My initial inclination proposal would be that there will be a file
 `Browser/tbb_verson.json` with the relevant metadata.

 {{{
  {"version":"6.5.2","architecture":"linux64","channel":"release","locale
 ":"en-US"}
 }}}

 The build process can trivially auto-generate something like this, and it
 can be updated by the standard auto update process.

 Inspired by #20792, #25012.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25020>
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