769189 - [BrowserAPI] Differentiate between regular locationchange and "error locationchange" events

Status: NEW

(Core :: DOM: Core & HTML, defect, P5)

Description

[Justin Lebar (not reading bugmail)]

nsIWebProgressListener's locationchange can either be a "normal" locationchange or an "error" locationchange.

The latter case occurs when, for example, we can't resolve a domain.  We still send a locationchange to that domain, but we indicate that it's of type error.

Embedders care about this because: Suppose I visit nytimes.com and I'm not connected to the network.  We'll get a locationchange of type error to nytimes.com, and then a titlechange saying "page not available" (or whatever).  The embedder shouldn't save this title as the canonical title for nytimes.com, e.g. in the history.  (Desktop Firefox has this bug.)

It might be less of a footgun to modify the title/iconchange events so that they indicate whether they're for a normal page or an error page.  But we should probably modify the locationchange event too.

Comment 1

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1472046

Move all DOM bugs that haven’t been updated in more than 3 years and has no one currently assigned to P5.

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