Three methods for enable shocwave flash plugin for firefox

Macromedia Flash, refers to the Flash Player and browser plugin needed to handle SWF videos, web page animations and interactive content. Even though the Flash plugin is also referred to as "Shockwave Flash", it should not be confused with the Shockwave plugin that handles "Shockwave for Director" content. After installed this shockwave flash plugin on Firefox, sometimes we will suffer the following three problems:
1.shockwave flash freezes firefox
2.shockwave flash keeps crashing firefox
3.shockwave flash firefox not working

Now how to solve these problems?
First method:
Click "Ctrl+Shift+A" to open plugin tab in firefox. Check your shockwave flash plugin and update to the newest version. Restart your firefox again, your problem will be solved.