Like many Ubuntu users out there, you have probably had problems with Flash Player in the past. I've had a lot myself, mostly related to poor performance, and sometimes with strange behavior such as videos playing too fast. People at Ubuntu have done a good job at adding better Flash support in the last year or two but I often feel it's still not enough. This is why I have been using the Flash-Aid plugin for Firefox for many months now.
Helping Firefox, but also Chromium
According to the official page, this Firefox add-on removes conflicting flash plugins from Ubuntu Linux systems, installs the appropriate version according to system architecture and applies some tweaks to improve performance and fixes common issues. All that in a single click! And because Chromium (and I suppose other browsers you may like) uses the same Flash packages, Flash-Aid will also "help" them.
How to install and use in Firefox 4
- Open Firefox
- Go to Tools / Add-ons menu
- In the Add-ons Manage, type "flash-aid" (without the quotes) in the search box located in the top right corner
- In the result list, locate Flash-Aid and click its install button located on the same row
- Restart Firefox, you should now have the Flash-Aid icon in the top right corner of your browser
- Click the icon and follow instructions
- You now have one of the best Flash installations possible
If you are also a Windows user, you will notice performance downgrade compared to Windows. At this point, you should mostly blame Adobe who won't put more effort in their Linux support.
If you have any other tip or trick to Flash tweaking, don't hesitate to post them.