If you don’t want browser plugins to run automatically, but prefer to “click to play” things like Flash movies, you can enable that feature in Firefox. Here are the steps:
about:configin the URL address bar.
- Search for
click_to_playuntil you find the settings for
- Double-click the “false” value to change it to “true”.
You will then have all Flash videos replaced with something like this:
And new options for plugins on a page-by-page basis:
If you ever want to reverse it, find the setting again and change it back to “false”.
Read more here.