1812505 - Firefox doesn't reuse cached responses for bugzilla.mozilla.org

Status: RESOLVED FIXED

(Core :: Networking: Cache, defect, P2)

Description

[6k64x4ma]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/110.0

Steps to reproduce:

1. Launch Firefox with a new profile.
2. Set network.http.rcwn.enabled to false.
3. Go to https://bugzilla.mozilla.org/home
4. Open the Network Inspector.
5. Click the link to https://bugzilla.mozilla.org/home

Actual results:

• Firefox doesn't use the If-Modified-Since or If-None-Match request headers.
• This is not a recent regression. I can reproduce this on Firefox 60.

Expected results:

• Firefox should send conditional requests.

Comment 1

[Valentin Gosu [:valentin] (he/him)]

Thanks for the report.
Indeed, there seems to have been a regression at some point.

This is as far as mozregression can go:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=c3f5e6079284a7b7053c41f05d0fe06ff031db03&tochange=5a2deb5a9b09df9ad2ca3ac1d0c480be250d31e4

Best candidates are Bug 1267474 and bug Bug 669259

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Based on comment #1, this bug contains a bisection range found by mozregression. However, the Regressed by field is still not filled.

:smayya, if possible, could you fill the Regressed by field and investigate this regression?

For more information, please visit BugBot documentation.

Comment 3

[Sunil Mayya]

Attachment: Bug 1812505 - conditional request must be sent for stale responses with immutable cache-control extension. r=#necko

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1267474

Comment 5

[Sunil Mayya]

Attachment: Bug 1812505 - add test to verify conditional requests are sent for stale responses with immutable cache-control extension. r=#necko

Depends on D181044

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c75fa383ab07
conditional request must be sent for stale responses with immutable cache-control extension. r=necko-reviewers,valentin
https://hg.mozilla.org/integration/autoland/rev/c7a752ac35e8
add test to verify conditional requests are sent for stale responses with immutable cache-control extension. r=necko-reviewers,valentin

Comment 7

[Iulian Moraru]

https://hg.mozilla.org/mozilla-central/rev/c75fa383ab07
https://hg.mozilla.org/mozilla-central/rev/c7a752ac35e8

Comment 8

[BugBot [:suhaib / :marco/ :calixte]]

The patch landed in nightly and beta is affected.
:smayya, is this bug important enough to require an uplift?

• If yes, please nominate the patch for beta approval.
• If no, please set status-firefox115 to wontfix.

For more information, please visit BugBot documentation.