Videos player crashes in Tor Browser when it's asked to play many videos at a time

[b0ax0c]

Sometimes videos just crash and no longer play unless the torbrowser is restarted and this happens at random

This happens on facebook , youtube and twitter

It can be reproduced by scrolling down this link

​https://twitter.com/search?f=videos&vertical=default&q=cats&src=typd

First few search results will be fine but keep scrolling down and videos will crash and cant play them

@intrigeri could reproduce this with Tor Browser 9.0 on Debian sid and
Tor Browser 9.0.1 on Debian sid

Reference ​https://redmine.tails.boum.org/code/issues/17175

[b0ax0c]

Browser console:

Unhandled promise rejection <unavailable> 5 13.video_player.en.3f52df782d1539fc483a.js:35:21458
​https://abs.twimg.com/k/en/13.video_player.en.3f52df782d1539fc483a.js:35
exports ​https://abs.twimg.com/k/en/13.video_player.en.3f52df782d1539fc483a.js:17
​https://abs.twimg.com/k/en/13.video_player.en.3f52df782d1539fc483a.js:35
exports ​https://abs.twimg.com/k/en/13.video_player.en.3f52df782d1539fc483a.js:17
<anonymous> ​https://abs.twimg.com/k/en/13.video_player.en.3f52df782d1539fc483a.js:17
​https://abs.twimg.com/k/en/13.video_player.en.3f52df782d1539fc483a.js:17
​https://abs.twimg.com/k/en/13.video_player.en.3f52df782d1539fc483a.js:17

[b0ax0c]

please select a suitable component for this ticket

[arma]

The big first question is: does Firefox esr have the same bug? Or is this bug new in Tor Browser?

[intrigeri]

I can reproduce this bug with Firefox 68.2.0esr on Debian sid, with no add-on enabled.

[gk]

Thanks for the report. Next steps would be:

1) Filing a report on Mozilla's bug tracker
2) Check whether the current Firefox stable has the same problem, if so
3) Check whether a currenty Nightly still has the issue
4) Use mozregression to find the problematic commit.

[gk]

Oh, and if someones files that bug, please link to the ticket here.

[baxc]

I lost access to b0ax0c user on tor but I can confirm that baxc on tor is mine and also ​https://bugzilla.mozilla.org/user_profile?user_id=650909 on mozilla

check: ​https://redmine.tails.boum.org/code/issues/17175#note-12

I created a ticket for this on mozilla bug tracker as well

​https://bugzilla.mozilla.org/show_bug.cgi?id=1595462

[gk]

Replying to baxc:

I lost access to b0ax0c user on tor but I can confirm that baxc on tor is mine and also ​https://bugzilla.mozilla.org/user_profile?user_id=650909 on mozilla

check: ​https://redmine.tails.boum.org/code/issues/17175#note-12

I created a ticket for this on mozilla bug tracker as well

​https://bugzilla.mozilla.org/show_bug.cgi?id=1595462

Thanks. Could you add me to that bug (with address gk[@]torproject[.]org (without the brackets))?

[baxc]

Replying to gk:

Thanks. Could you add me to that bug (with address gk[@]torproject[.]org (without the brackets))?

done, please check and confirm

[gk]

Replying to baxc:

Replying to gk:

Thanks. Could you add me to that bug (with address gk[@]torproject[.]org (without the brackets))?

done, please check and confirm

Looks good, thanks!

[baxc]

I submitted this to tor bug bounty

[pili]

Moving tickets to December

[pili]

Moving tickets to February

[sysrqb]

Deferring some more tickets from February 2020 to June 2020. Too many tickets, not enough time.

[sysrqb]

Second attempt at deferring tickets until June.

[sysrqb]

Batch move remaining tbb-9.0-issues -> 9.5-issues