Torcrazybutton eats all memory and crashes Tor Browser

When playing mp4 video not on whitelisted youtube, 2 tabs with videos are opened (autoplay, 'cause Temporary allow for site only by NoScript), one tab is closing by user, switch to another, no response, memory is growing, crash... The most suspicious component: NoScript (another one string-handling bug?) Continuing investigation... Log: Faulting application name: firefox.exe, version: 38.5.0.0, time stamp: 0x00000000 Faulting module name: mozalloc.dll, version: 38.5.0.0, time stamp: 0x00000000 Exception code: 0xc0000005 Fault offset: 0x00001582 Faulting process id: 0xf64 Faulting application path: C:%REMOVED%\Tor Browser\Browser\firefox.exe Faulting module path: C:%REMOVED%\Tor Browser\Browser\mozalloc.dll DynamicSig[1].Name=OS Version DynamicSig[1].Value=6.1.7601.2.1.0.256.1 DynamicSig[22].Name=Additional Information 1 DynamicSig[22].Value=0a9e DynamicSig[23].Name=Additional Information 2 DynamicSig[23].Value=0a9e372d3b4ad19135b953a78882e789 DynamicSig[24].Name=Additional Information 3 DynamicSig[24].Value=0a9e DynamicSig[25].Name=Additional Information 4 DynamicSig[25].Value=0a9e372d3b4ad19135b953a78882e789