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StumbleUpon supported platforms:

• Windows 7
• Windows XP

StumbleUpon supported devices:

• Windows Desktop

StumbleUpon architectures:

• 32-bit

Latest user agents:

• Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; StumbleUpon.com 1.760; .NET CLR 1.1.4322)
• Mozilla/5.0 (Windows NT 6.1; stumbleupon.com) Chrome/58.0.3029.110 Safari/537.36