Running Tor Browser 8.x debug builds crashes on Windows during first start

For #28874 (moved) I tried to create a debug build for Windows in order to get more information from a user on what is going on on their machine. While testing the debug build myself it turns out it crashes in different ways when running, making this approach of debugging #28874 (moved) unusable. On first start it crashes with:

Assertion failure: mState == FAILED || mState == STARTED || mState == CLONED (St
ate invariants violated), at /var/tmp/build/firefox-2bb5c165697d/widget/windows/
AudioSession.cpp:344
#01: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x25b7bed]
#02: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x25b7c2d]
#03: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x22a5ec8]
#04: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x22a71bd]
#05: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x22a76bd]
#06: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x22a8add]
#07: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x116abff]
#08: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x116b0cd]
#09: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x116b348]
#10: DumpBidiLine[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dll +0
x2a682ec]
#11: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x41b76e0]
#12: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0xf8fa20]
#13: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x112aa4f]
#14: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x1d6c758]
#15: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x4207b15]
#16: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_web[Cghlil\dB 4r0o
1w2,s eMari\n xTuhrle.add]l WlA RN+I0NGx:1 N1o5 C6IdD 3f0ou]n
 w#h1en7 :at tmemopztiinlg ltao _mdapu mcopn_triamcta gIDe:[ fCi:le\ U/vsaer/rts
m\p/AbMuiOl_d/Tfeirsetfo\xD-2ebsb5kct16o5p69\7Td/oxrpc oBm/rcoomwpsoneernt_sw/ne
sbCogmlpo\nBenrtoMawnsageerr.\cxppu,l l.idnel l50 8+
0x1381927]
#18: mozilla_dump_image[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.
dll +0x198814e]
#19: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x431a8ec]
#20: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c4083c]
#21: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c40bef]
#22: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c40d62]
#23: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3995f86]
#24: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3933d02]
#25: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x398ef69]
#26: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x398f04b]
#27: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x431a8ec]
#28: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c40b2a]
#29: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c40bef]
#30: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c33224]
#31: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c40386]
#32: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c408dd]
#33: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3c40bef]
#34: XRE_GetBootstrap[C:\Users\AMO_Test\Desktop\Tor Browser_webgl\Browser\xul.dl
l +0x3d078ad]
#35: ??? (???:???)
Hit MOZ_CRASH(accessing non-early pref privacy.spoof_english before late prefs a
re set) at /var/tmp/build/firefox-2bb5c165697d/modules/libpref/Preferences.cpp:9
32

On subsequent starts I only hit the MOZ_CRASH in the above output but the browser is unusable:

WARNING: No CID found when attempting to map contract ID: file /path/to/nsComponentManager.cpp, line 508
Hit MOZ_CRASH(accessing non-early pref privacy.spoof_english before late prefs set) at /path/to/Preferences.cpp:932