Go to Preferences>advanced>content>javascriptoptions and set the folder where you want all your scripts or you can set it to be page specific by right clicking on a page and edit site preference>scripting.
Below is a link to a script simular to Firefox Grab and Drag extension. (Scroller.js) open the script with notepad to edit it. For example to get rid of having to push ctrl to activate it. Set it to “false” (outstanding script)
Scroller.js
Too many scripts will slow down Opera.
