Extensions
Number of search results for 'youtube video downloader': 485
HTTP Switchboard
Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.
WOT
WOT creates a secure browsing environment, showing website security icons next to every URL & reputation alerts for unsafe websites
Shortkeys
Easily customizable keyboard shortcuts for Opera
SelectorsHub
xPath plugin to auto generate, write and verify xpath & cssSelector.
googleNewsModernLiteralizer
enables visited link colors on Google News (gN) for convenient browsing
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