STR:

• Go to some page like https://example.com, ensure you have user activation and execute the following code
• console.log(window.open("about:blank").document.baseURI)

Expectation: https://example.com
Actual: about:blank

Cause: I expect nsWindowWatcher::OpenWindowInternal has to set openWindowInfo->mBaseUriToInheritForAboutBlank. But I'm unsure based on what conditions that should happen.

Set release status flags based on info from the regressing bug 543435

Vincent, could you set a severity please?

https://treeherder.mozilla.org/jobs?repo=try&revision=aca6b0e361013c46dfd8ae8f425b5e9a7ec5efd5

For web compat, it suffices to have the right base URI once the initial
document is being loaded. This means we can match what would happen in
Document::Reset, instead of propagating the base URI via nsOpenWindowInfo.

Bug 543435 was reverted from Fx147. Updating the flags accordingly.

https://treeherder.mozilla.org/jobs?repo=try&revision=8038769fab072a36796a82e5a0d6bb3dbb62321e

https://treeherder.mozilla.org/jobs?repo=try&landoCommitID=167935

https://html.spec.whatwg.org/#following-hyperlinks-2 step 7 chooses a navigable with "subject's node navigable" as current navigable / creator. So for link clicks, OpenWindowInternal needs to use parentDoc.

https://html.spec.whatwg.org/#window-open-steps step 2, 13 on the other hand uses the entry global's navigable as creator. So for window.open, we want to use the entry global as my patch does.

Maybe we can try to use the entry global and otherwise fall back to parentDoc. Or we accept that window.open incorrectly uses the parent instead of entry global.

(In reply to Vincent Hilla [:vhilla] from comment #13)

Maybe we can try to use the entry global and otherwise fall back to parentDoc.

https://treeherder.mozilla.org/jobs?repo=try&landoCommitID=168263

https://hg.mozilla.org/mozilla-central/rev/00767bd39f44
https://hg.mozilla.org/mozilla-central/rev/d4561e2a7b33