1197940 - Running multiple instances of the flash player on the BBC website render Firefox unusable

Status: RESOLVED DUPLICATE of bug 1197943

(Core Graveyard :: Plug-ins, defect)

Description

[Trevor Rowbotham [:rowbot]]

I am using the latest nightly on Windows 10.  This occurs with the latest stable version of Flash as well as the latest Flash beta.

STR:
1) Go to http://www.bbc.co.uk/programmes/p02wns22.
2) In a new tab, go to http://www.bbc.co.uk/programmes/p02zfwz9.
3) Switch back to the first tab.

Actual Results:
In e10s, the spinner shows up indefinitely and Firefox shows a message about a script slowing down the browser. I am given the option to kill the plugin or web process.  In non-e10s, the UI locks up for a while and eventually a popup will appear asking if I want to stop the plugin or wait for it.  I am forced to open the task manager and end the task.

Expected Results:
Firefox should be able to handle multiple instances of the BBC flash player.

Comment 1

[Trevor Rowbotham [:rowbot]]

This is a result of the plugin sandbox being enabled.

Comment 2

[Chris Peterson [:cpeterson]]

Trevor, are you using 64-bit Firefox?

Comment 3

[Trevor Rowbotham [:rowbot]]

Yes, I am using the 64-bit nightly.

Comment 4

[Benjamin Smedberg]

The fact that it hangs Firefox in e10s mode is being tracked in bug 1198368.

We should leave this open to track that the sandbox causes a Flash hang at all. That shouldn't happen.

Comment 5

[Benjamin Smedberg]

Actually cpeterson says we're using bug 1197943 to track the hang.

Comment 6

[Brad Lassey [:blassey] (use needinfo?)]

Trevor, would you mind testing this in Beta as well? Please turn on the sandbox (set dom.ipc.plugins.sandbox-level.flash to 2) to enable the sandbox.

Comment 7

[Trevor Rowbotham [:rowbot]]

Brad, this hangs beta as well with the sandbox enabled.  Like in comment 0, I am shown a prompt after about 10 seconds asking if I want to let the script continue or to kill it.  Alternatively, if I wait, the plugin timeout will kick in after 45 seconds and kill the plugin process for me.

While opening 2 tabs with the flash player will hang the browser immediately, I noticed that opening only 1 tab with the flash player will allow the video to play, but upon closing the tab, it will hang the browser.  Most likely the same problem here, but I just wanted to add that.

Please feel free to ping me if you need me to test anything else or need more info.