I understand free softwares such as FileZilla need money to sustain, but it’s annoying for FileZilla to pin Opera on the dock of my MacBook (after I forgot to uncheck the “option” to install Opera). More annoying is I can’t find the Opera app in the /Applications folder. After searching for a few minutes, I found the Opera app was in

~/Applications

So just delete “Opera.app” and remove its icon from the dock.

(Some other words: Opera browser is partly owned by QiHoo 360, a Chinese company notorious for its difficult-to-uninstall and hijack-your-browser “anti-virus” softwares for Windows. Hey 360, leave Mac alone!)