Youtube – How to switch back to old YouTube layout

I'm not sure about Flash, but I recognize the problem you're having. Firefox's <video> support hasn't yet been done properly, so it's much slower than any other method.

If nobody else suggests something you like better, FlashVideoReplacer would let you swap out the YouTube-provided player for either the Quicktime or VLC plugin and both should run faster than Flash or Firefox's internal <video> support.

(It also supports various players which appear in their own windows, but you probably don't want that)

Another option you could try would be to track down WHY YouTube is forcing HTML5 on Firefox by trying these one-by-one:

• deleting all YouTube cookies (YouTube's fault but configurable)
• running in Safe Mode to disable extensions (One of your extensions' fault)
• using the User Agent Switcher extension (YouTube's fault, not intended to be configurable)

Finally, if none of that works, you could give Google Chrome a try. Its extension system isn't as powerful as Firefox's, but AdBlock Plus does have a version for it.

They seem to have removed the button, but there is a workaround.

Copy the username of the person you want to add as a friend (just under Created by; 'GamingSE' in your example), and then go to your Inbox > Address Book. Click on New > Contact... and type in the username inside the Username box on the right pane. Now click Save, select that user, click Add to Friends on the above bar and you're done. This is the only way to add someone as a friend at the moment.