[Bug 1999308] Re: Snap keeps uninstalling apt Firefox, and reinstalling snap Firefox

[Sebastien Bacher]

> not to guarantee that the most recent version of the software is
installed but to guarantee that a specific version of the software is
pinned, without pinning it. Not cool but a bug.

it's more complicated than that. The versioning has been picked to avoid
having to re-upload the deb to keep up with versions.

Let's say we would version that deb 108-22.04snap1 today in the LTS
serie. Firefox is distributed as a deb in 20.04 and is versioned
108-0ubuntu0.20.04.1. When 109 is out the deb in 20.04 as well as the
snap are updated. For upgrades from 20.04 to 22.04 to be possible and
work correctly any deb available needs to have a package version number
in the newer serie, which means we would to do a stable update to bump
the version of the wrapper over the version now available in 20.04.

Those updates would have no real purpose out of catching up with
versioning, to creating extra work on the Ubuntu team/SRU
reviewers/testers we decided to use an epoch and always have the package
newer than the 'old deb' to ensure safe upgrade paths.

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Title:
  Snap keeps uninstalling apt Firefox, and reinstalling snap Firefox

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