[tor-bugs] #19528 [Applications/Tor Browser]: The build id stays the same with every Firefox update

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#19528: The build id stays the same with every Firefox update
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 Reporter:  gk                        |          Owner:  tbb-team
     Type:  defect                    |         Status:  new
 Priority:  Medium                    |      Milestone:
Component:  Applications/Tor Browser  |        Version:
 Severity:  Normal                    |     Resolution:
 Keywords:                            |  Actual Points:
Parent ID:                            |         Points:
 Reviewer:                            |        Sponsor:
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Comment (by boklm):

 Replying to [comment:2 gk]:
 > What about just updating `REFERENCE_DATETIME` in the Firefox descriptor
 if a new Firefox version is used or using a separate one (like
 `REFERENCE_DATETIME_FIREFOX`) to begin with just for the Firefox part?
 That way we would solve both problems like #19400 and we could retain
 partial builds as we have them now: no need to rebuild all the artifacts
 if the Firefox version changes or if we only rebundle or are doing a
 buildN.

 This looks like a good idea.

 Replying to [comment:3 gk]:
 > We could use the output of e.g. `cat browser/config/version.txt` to
 construct something.

 Yes, we could probably convert the version number to an increasing number.
 However, if we release a Tor Browser update based on the same firefox
 version, then the build id will not change.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19528#comment:4>
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