I really like the opera browser, because it provides built-in vpn, adblocker as well as the auto pop up 'search' and 'copy' option after highlight words, the outlook of opera is also my favourite part.
But here something make me change to use other browser.
First is the built-in adblock sometimes cannot block all the ads in some website, I know no adblocker can do it too, but other adblockers have a option for user to custom the adblocker, like I want to block some ad on website manually, however opera browser doesn't have this function.
Another problem is sync, like chrome, firefox allow user to sync the add-ons too, but opera doesn't. So whenever I download opera in school computer, I have to download the plugin for opera again manually, which is very inconvenient.
Also the search engine engines is very good, because user can add search engines other than default, this is better than firefox because firefox only allow user to change or install a plugin for that. But opera can offer a option for user to add search engine not limited by plugin. However the problem I met is I cannot change the default search engine 'Keyword', which is wired. I really don't understand why opera don't allow user to change the keyword. For example I add a search engine is youtube and keyword is 'y', but opera already set 'y' for yahoo, which I hate and never use anymore.
The only option for me is to set another keyword, which cause me some inconvenient.
Last but not least, sorry for my poor English, but I really hope opera can improve what I have mentioned. So I back to use opera again.