Every web page crashes on Windows 7 with Tor Browser 8

I keep receiving "Gah! Your tab just crashed" for every web-page I visit with Tor Browser 8 (every version up to 8.0.4 and also 8.5a5) under Windows 7 64-bit. This does not happen with Tor Browser 7 (7.5.6). I tried deleting and reinstalling Tor, disabling antivirus/firewall etc, but with no luck. Any advice?

Trac:
Username: testcy

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