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I installed Firefox beta 9 and the flash plugin as a .tar.gz file. I unpacked it, installed it and now I can watch YouTube videos smoothly.

But I want to play mp3 codecs and other restricted stuff on my laptop. Should I uninstall the flash plugin for Firefox or just install the ubuntu-restricted-extras package (which contains everything I need)?

If I install the package without uninstalling the plugin, will anything bad happen?

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Probably it will get replaced (i'm not sure i use Chromiuim) but anyhow you'll still have flash support and the mp3 codecs if you install the package. – Uri Herrera Nov 18 '11 at 8:02
up vote 3 down vote accepted

No it does not matter if you already have flash installed. Personally, I always install the restricted extras and I have never experienced any problems or clashes with flash or any other codecs. I also use Firefox.

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This will take care of your audio/video decoding needs, part of what restricted extras or addons installs

sudo apt-get install gstreamer0.10-ffmpeg gstreamer0.10-plugins-bad \
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I think you need gstreamer0.10-fluendo-mp3 to play mp3s. – mikewhatever Nov 18 '11 at 9:15
@mikewhatever no you don't. – RolandiXor Nov 19 '11 at 14:44

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