I think those will work fine, my worry is that significant part of extensions that I use will no longer be available. I don't believe their functionality can be

I think those will work fine, my worry is that significant part of extensions that I use will no longer be available. I don't believe their functionality can be replaced with web extensions. Here are some: - FireGestures (mouse gestures) - NoScript (it can do much more than the Chrome equivalent) - SecureLogin (wand-like behavior from Opera; basically instead filling login and password after page loads it logs you in after pressing a button) - Tab Scope (thumbnail of webpage when you hover over a tab) - Tree Style Tabs (it does what the name says) - Informational Tab (this I can live without, but I like it, it puts progress bar in the tab which looks nice) This news sucks, first Opera 12 was discontinued and replaced with Chrome with different skin. I finally moved to FF and used multiple extensions to get some of Opera functionality back and now those are going away.