The tendency of Google to artificially restrict alternative browsers in accessing its resources has long been known. This was especially noticeable on Opera (Presto), which I used and use, and today I received a complete glitch in
G + when I tried to enter any of its pages.

Yesterday, 10/13/2014, access for Opera 12.17 (Presto) was opened and
G + was displayed correctly.
Gmail mail is still working and access to
youtube too (although comments have been crooked for a week now, I suspect that for about the same artificial reasons), it’s not important whether you are logged in or not - there is no access to
G + . The new version of Opera (Blink) works fine and does not experience any problems. That such things and it is sad - artificially fenced objectionable browser.
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For me, the problem is quite relevant, since only Opera Presto sparingly consumes RAM with many open tabs. The new version with the engine Blink devours memory mercilessly. Other browsers do not behave better. In the same G +, the difference in used memory can be between 1.5 times between Presto and Blink.