Features that has been there for ages. It's not like they are essential to have in a good browser but once you get used to them it's painful to switch.
For me it is configurability (if that's a word). Primarily ability to configure controls out of the box. For keyboard, mouse and mouse gestures. This includes dozens of custom actions, even javascript, all of which can be combined using logical conjunctions. No other browser I tried allows you this, not even close.
Configuring the UI is pretty straight forward as well, and if there is anything not available through the UI you can always dig into config files.
Some other features it's hard to browse without: global and per-site configuration of: blocked content, pop-ups, javascript, cookies, plugins, on demand plugins, images, custom layouts, .... edit: and back button actually works as expected
That's just a small subset of dozens of features I miss in other browsers. I don't use any of those extra apps (reader, mail, torrent, irc, ...) but they don't bother me either.
And what I miss in Opera? Switching tabs by their position (alt/ctrl+number in many tabbed applications). That's it. What bothers me is that many sites do not work properly or are completely blocked in Opera. The former is due to low market share of Opera, the latter is because people are dicks (hi google). Just write that it's not supported and I won't call your support line, don't make me change my user agent all the time (luckily I can configure this per-site :P).
edit: Totally forgot this but other comment pointed it out: Opera can handle a lot of tabs, no other browser I tried could do this: memory, performance and UI wise.
For me it is configurability (if that's a word). Primarily ability to configure controls out of the box. For keyboard, mouse and mouse gestures. This includes dozens of custom actions, even javascript, all of which can be combined using logical conjunctions. No other browser I tried allows you this, not even close.
Configuring the UI is pretty straight forward as well, and if there is anything not available through the UI you can always dig into config files.
Some other features it's hard to browse without: global and per-site configuration of: blocked content, pop-ups, javascript, cookies, plugins, on demand plugins, images, custom layouts, .... edit: and back button actually works as expected
That's just a small subset of dozens of features I miss in other browsers. I don't use any of those extra apps (reader, mail, torrent, irc, ...) but they don't bother me either.
And what I miss in Opera? Switching tabs by their position (alt/ctrl+number in many tabbed applications). That's it. What bothers me is that many sites do not work properly or are completely blocked in Opera. The former is due to low market share of Opera, the latter is because people are dicks (hi google). Just write that it's not supported and I won't call your support line, don't make me change my user agent all the time (luckily I can configure this per-site :P).
edit: Totally forgot this but other comment pointed it out: Opera can handle a lot of tabs, no other browser I tried could do this: memory, performance and UI wise.