Any version of Ubuntu 14.4.2+ That Uses YouTube with Firefox [SOLVED]

[PCNetSpec]

Yeah in the drop down that says

firefox prevented the outdated "Adobe Flash" from running on <URL>

You'll have to select Allow > Allow and Remember

[perknh]

Well, gentlemen, you diagnosed and resolved that troublesome Flash problem.

A thousand thanks from the owner of this old legacy computer and from me.

And here's the song that we were unable to play before, but now can play for the joy of it.

Thank you,

perknh

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https://www.youtube.com/watch?v=V1bFr2SWP1I or

https://www.youtube.com/watch?v=V1bFr2SWP1I

P.S.

And a bit about Israel Kamakawiwoʻole (Kah-MAH-kah-VEE-voh-OH-lay) -- the man who sang this song.

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https://en.wikipedia.org/wiki/Israel_Kamakawiwo%CA%BBoleor

https://en.wikipedia.org/wiki/Israel_Kamakawiwo%CA%BBole

[perknh]

I'm home now, and thank you two, rjm65 and PCNetSpec, for your help with Flash on that old computer. 

Since MATE was acting up on that old computer, I installed Lubuntu.  But, boy, did I notice a difference with speed.  Relatively speaking, MATE flew on that old computer, but Lubuntu seems pretty slow.

I wonder why LXDE is slower than MATE-- at least on that old computer.  Of course I'm also wondering why MATE froze on that old computer, so much so that it had to be turned off by a hard shut down. 

[rjm65]

I'm home now, and thank you two, rjm65 and PCNetSpec, for your help with Flash on that old computer. 

Since MATE was acting up on that old computer, I installed Lubuntu.  But, boy, did I notice a difference with speed.  Relatively speaking, MATE flew on that old computer, but Lubuntu seems pretty slow.

I wonder why LXDE is slower than MATE-- at least on that old computer.  Of course I'm also wondering why MATE froze on that old computer, so much so that it had to be turned off by a hard shut down. 

Yup certain machines just are slow, I have two machines here a eeepc and a dell and they both have same processor one has 1 gig ram the other 2 gig, now the 2 gig rig flies and the dell is super duper slow...  I asked a while back for ways to speed it up, didn't get any ideas for help, so i left it go and closed the thread.... 
the eeepc flies with mint 17 cinnamon when i had cinnamon on the dell it was so slow it could not be used, i put peppermint 5 on the dell and tweaked everything i could and it is still slow, it's like the dell has something in the system that just does not perform well with any linux....   

[perknh]

And then MATE was fast but the computer would not boot up by moving the mouse after it had been idle for awhile.  But Lubuntu is proving itself to be very slow.  Hopefully it's a cookie issue, but I believe that is just wishful thinking.

This old computer, by the way, is an HP.

Update:  5 days later, this may be the command that will remedy MATE's freezing problem, which isn't a problem per se of Ubuntu MATE, but apparently of Ubuntu 14.04 in general:

http://itsfoss.com/keyboard-mouse-freeze-suspend/

or

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http://itsfoss.com/keyboard-mouse-freeze-suspend/