1662927 - Opening a tab and quickly typing and selecting a page to open does not load the page

Status: RESOLVED DUPLICATE of bug 1662925

(Core :: DOM: Service Workers, defect)

Description

[Anny Gakhokidze [:annyG]]

Attachment: issue.gif

I think this might be a fission only bug, but I'll observe it some more and report back.

I haven't been able to reproduce it using mozregression tool while investigating bug 1662925.

Steps to reproduce:

1. Make sure the url you will be testing is one in your frequently visited list, I used https://web.telegram.org
2. Open a tab via shortcut (Command-T for me on Mac)
3. Quickly start typing the url and as soon as it pops up in the suggestions, press enter

expected: the page starts loading
actual: no visual indication that a page is loading (reload button is still active, has not changed state) and the page does not load, see attached GIF

NI-ing Neha as I'm not sure who should look at this.

Comment 1

[Anny Gakhokidze [:annyG]]

Note that even though there is an update pending (as seen in the GIF), I updated firefox after recording this and it is still happening as of build 82.0a1 (2020-09-02).

Comment 2

[Anny Gakhokidze [:annyG]]

(as I said in https://bugzilla.mozilla.org/show_bug.cgi?id=1662925#c1) Another way to check this, is for me to download the firefox binary that includes my changes, but excludes the commit range above, use it for a day or two and see if it happens with my patches as well. I'll do that in the meantime.

Comment 3

[Andrew McCreight [:mccr8]]

I'm seeing this same issue, trying to visit the front page of Twitter and Reddit.

Comment 4

[Andrew McCreight [:mccr8]]

We should figure out if this is Fission related or not. It is a pretty bad regression.

Comment 5

[Neha Kochar [:neha]]

Probably same underlying issue as bug 1662925.

Comment 6

[Andrew Sutherland [:asuth] (he/him)]

Based on our current understanding of the underlying causes of bug 1662925, this is likely that bug. Specifically, the bug triggers when attempting to queue a Fetch event to a process for which the PRemoteWorker actor has not yet been created. This will occur in cases where we opt to launch a new process because no process with the correct remoteType already exists.