1841215 - Hard code UA string's macOS version as 10.15

Status: RESOLVED FIXED

(Core :: Networking: HTTP, task, P3)

Description

[Chris Peterson [:cpeterson]]

Firefox 115 is the last version to support macOS versions < 10.15 (bug 1836375). Firefox (like Safari and Chrome) already caps the UA string's macOS version at 10.15 to avoid webcompat breakage from sites not expecting macOS versions >= 11.0 (bug 1679929).

Since the UA string's macOS version will no longer be < 10.15 or > 10.15, we can now hard code the UA string's macOS version as 10.15.

Comment 1

[Chris Peterson [:cpeterson]]

Attachment: Bug 1841215 - Hard code UA string's macOS version as 10.15. r?#necko-reviewers

Firefox 115 is the last version to support macOS versions < 10.15 (bug 1836375). Firefox (like Safari and Chrome) already caps the UA string's macOS version at 10.15 to avoid webcompat breakage from sites not expecting macOS versions >= 11.0 (bug 1679929).

Since the UA string's macOS version will no longer be < 10.15 or > 10.15, we can now hard code the UA string's macOS version as 10.15.

Comment 2

[Masatoshi Kimura [:emk]]

I was told to hold off landing such patches (see bug 1836875 and bug 1836274). Is it ready now? I consider hard coding Windows UA strings (no bugs are filed yet).

Comment 3

[Chris Peterson [:cpeterson]]

(In reply to Masatoshi Kimura [:emk] from comment #2)

I was told to hold off landing such patches (see bug 1836875 and bug 1836274). Is it ready now? I consider hard coding Windows UA strings (no bugs are filed yet).

I originally wrote this patch as part of a "UA reduction" proposal to reduce UA fingerprinting, like Chrome's UA reduction proposal: https://www.chromium.org/updates/ua-reduction/

When I learned that macOS 10.12 - 10.14 users would be moved to ESR 115 (bug 1836375) and I saw the Windows 7-8.1 removals landing (bug 1594270), I submitted this patch for review.

I have a patch to hard code the Windows UA's versions (and re-enable the 32-bit Windows UA tests). I'll submit it soon.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/ba73a7622f63
Hard code UA string's macOS version as 10.15. r=necko-reviewers,jesup

Comment 5

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/ba73a7622f63