Arch Linux

skip

Member

Registered: 2010-02-16

Posts: 47

Flash slow (90% CPU usage) in Firefox but fine in private browsing

For some reason flashplayer (npviewer.bin) has slowed down considerably in Firefox. I get maybe 5fps in Youtube and CPU usage of npviewer.bin hovers around 90%. However if I am in Firefox's private browsing session, everything is fine, CPU usage is normal and the frame rate is as it was.

I tried disabling all my addons but that didn't help. Why the massive difference in performance between the two environments?

skip

Member

Registered: 2010-02-16

Posts: 47

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

Ok more wierdnesss. It only seems to affect Youtube when watching a video at Youtube.com. Watching an embedded video on another site ran fine...

skip

Member

Registered: 2010-02-16

Posts: 47

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

This only seems to affect watching videos on Youtube.com. Vimeo videos play fine.

hidefromkgb

Member

Registered: 2009-08-03

Posts: 146

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

I can't tell you the exact reason why it's happening, but I can suggest a method to solve it.
Make a backup of your FF configs, and then delete the whole FF folder from ~/.
The simplest way to do both things is just to rename it.

PS.
the problem seems to be AdBlock/FlashBlock related…

Last edited by hidefromkgb (2011-03-03 18:24:44)

skip

Member

Registered: 2010-02-16

Posts: 47

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

PS.
the problem seems to be AdBlock/FlashBlock related…

I disabled both and videos from YT are still slow...

Lothium

Member

Registered: 2009-10-10

Posts: 192

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

For me some videos on YouTube aren't working anymore. All other flashcontent is working fine. I also opened a thread a few minutes ago. https://bbs.archlinux.org/viewtopic.php?id=114481

skip

Member

Registered: 2010-02-16

Posts: 47

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

Has YT updated their onsite Flash player? Perhaps it does not play well with Flash on Linux...

Last edited by skip (2011-03-03 19:23:34)

shaurz

Member

Registered: 2004-02-02

Posts: 358

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

I've noticed problems with YouTube videos for a few days. Videos are stuttering, stopping and disappearing (just showing a gray box where the player should be).

skip

Member

Registered: 2010-02-16

Posts: 47

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

I've noticed problems with YouTube videos for a few days. Videos are stuttering, stopping and disappearing (just showing a gray box where the player should be).

Yeah that  gray box thing is definitely happening to me as well.

skip

Member

Registered: 2010-02-16

Posts: 47

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

I clicked 'pop-out' in YT so the video runs by itself in it's own window/tab and it's smooth as silk... wierd.

shaurz

Member

Registered: 2004-02-02

Posts: 358

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

I noticed another thing - if you start a video and then open another video in a tab the first video stops and jumps between two frame (but the audio keeps playing and you can pause/resume it by clicking on it).

Acce

Member

Registered: 2010-04-23

Posts: 11

Re: Flash slow (90% CPU usage) in Firefox but fine in private browsing

Although it's more of a workaround rather than a solution, I suggest using https://addons.mozilla.org/en-US/firefo … oreplacer/
which allows you to watch youtube and some other sites in your native video player instead of flash player.