Do any Opera users here have been having problems recently with Gmail? Well, I have. Often I get connection problems for no reason. If I use another browser, it works fine. After googling around a bit, I found out that it's most probably Gmail's fault. And then I had an idea. What if they are doing this on purpose? Even though it doesn't really make much sense to annoy the niche of Opera users, it's not impossible. So I experimented a bit with the settings on Opera and masked it to appear as Chrome. And guess what: It works a lot better now. :/
If you want to do the same, it's not complicated. First close Opera. Now open this file:
%SYSTEMDRIVE%\Users\%USERNAME%\AppData\Roaming\Opera\Opera\operaprefs.ini
Under [User Prefs] add (or edit if already there):
Custom User-Agent=Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11
Under [User Agent] add (or edit if already there):
Spoof UserAgent ID=4
There are a few variants on the user agent (e.g. Windows NT 6.1 is Windows 7 and Windows NT 6.2 is Windows 8), but generally you don't need to bother with those.
Now Gmail will think that you are connecting with Chrome and stop discriminating your Opera browser.