That's it I can't watch a video in Youtube simple because the reproduction is too slow and it's somewhat paused. I seem to have Flash player plugin installed in both chromium and firefox (I haven't tried chrome though, I'll try it later to see what happens) I don't know if that's enough but I just need to fix that bug. Could someone advice me to do something? Is there anything I can do?
Chrome has flash built-in. You will have to uninstall flash since Chrome may have issues with trying to deal with two versions of Flash.
I currently use Chrome and find the built-in flash good.
Chromium, the open source version of Chrome, does not have built-in flash. Therefore, you will have to download Chrome directly from Google.
The other option is to create a RAMDisk. RAMDisk can speed up flash videos. Furthermore, 64-bit Ubuntu seems to be faster than 32-bit Ubuntu. Although, the computer must be able to support 64-bit.
Adobe stopped providing updates for Flash. Therefore, Chrome is the only way to keep up-to-date with the latest flash versions in Linux.
As for me, I have used Firefox, Chromium, and Chrome. Chrome works the best. Unfortunately, I had to uninstall PulseAudio and install ALSA. PulseAudio was causing some issues with some flash games. The volume control kept going on then mute which caused some issues.
From what I understand, Flash works best with ALSA. In any case, trial and error maybe the only way to find out what works best in your system.
Hope this helps.