ESR is for slower feature releases (~annually rather than monthly) that still mostly get regular critical patches in between. That’s an orthogonal topic.
What I meant is that this “major” version of firefox could have been 116.1.0 rather than 117.0.0 because it didn’t introduce any significant features that could warrant a major version bump, “just” bug fixes.
They don’t really use the major.minor.bugfix scheme anymore. If they did, they wouldn’t be at version 117.
I tend to think of them all as minor updates that add up over time, like a rolling release with numbers.
It’s not semver (that’d put them on, IDK, 4.something maybe) but the versions before the first dot still signifies “significant” to me which this is not.
That’s not rolling release, that’s still a form of stable releases. You’ll get the feature set of 117 for a month or so with important bugfixes backported from fresher branches. If that ain’t stable, IDK what is. The only truly rolling release of Firefox is Nightly.