No mouse chording (distinct from gestures). Wikipedia even highlights Opera as a key implementation of mouse chording, and now its gone. http://en.wikipedia.org/wiki/Mouse_chording
No closed tabs drop down. Its not uncommon for me to want to dig out a tab I may have closed 20 tabs ago. Reopening one-by-one is terrible.
No forward slash search (รก la Vim, or indeed, Firefox)
If these things aren't tabled for Opera 15's release, then thats it, I'll be back to Firefox after 9 years on Opera. These sort of small features are Opera's bread and butter, things that have become second nature to me, and I suspect many. Certainly for me, its these little things that have kept me on Opera until now.
Where can we go to provide feedback? The OP provides no obvious link.
Trying to be positive, Stash looks like it might be useful.
Judging by past Opera development, they always need massive complains to fix something.
The main reason I use Opera: Editing preferences for every site separately.
Starting from the scratch and reimplementing everything that was slowly improved through many years is impossible. The proper way is replacing/improving piece by piece of the system. The management should have read
http://www.insearchofstupidity.com/
But they won't blame themselves to lose what's left of their loyal customer base if they just deliver a rebranded Chromium.
> The main reason I use Opera: Editing preferences for every site separately.
That way I enjoy the quietness (by default) of the sites and the higher security of browsing. When I really, really need sites which depend on too much moving parts I start some other browser, but for day-to-day browsing I enjoyed not having to install any extension but still having something like "noscript." If Opera fails, I'll have to discover how to get similar functionality on some other browser.
No thumbnails/previews in tab bar.
No any customisation of toolbars.
No fast forward.
One-key keyboard shortcuts work, but funny: in text boxes they work simultaneous with text input.
Ctrl+Z don't open old tabs.
No image properties, so no EXIF viewer.