I’ve downgraded, but I still get crashes. Most recent stack trace:
Thread 1 Crashed:
0 com.apple.WebCore 0x9d2de6f6 WebCore::TimerBase::~TimerBase() + 134
1 com.apple.WebCore 0x9d308081 WebCore::StyleResolver::~StyleResolver() + 289
2 com.apple.WebCore 0x9e5774ae WebCore::Style::Scope::scheduleUpdate(WebCore::Style::Scope::UpdateType) + 174
3 com.apple.WebCore 0x9e5778b1 WebCore::Style::Scope::didChangeStyleSheetEnvironment() + 161
4 com.apple.WebCore 0x9d2c0e25 WebCore::Page::setDeviceScaleFactor(float) + 85
5 com.apple.WebKitLegacy 0x9e88d88b -[WebView _windowDidChangeBackingProperties:] + 155
6 com.apple.Foundation 0x95184a6f __57-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_2 + 32
7 com.apple.CoreFoundation 0x9378f812 CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER + 18
8 com.apple.CoreFoundation 0x9378f6c1 _CFXRegistrationPost + 481
9 com.apple.CoreFoundation 0x9378f3b9 ___CFXNotificationPost_block_invoke + 201
10 com.apple.CoreFoundation 0x937500a3 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1555
11 com.apple.CoreFoundation 0x9374f037 _CFXNotificationPost + 631
12 com.apple.Foundation 0x951480e9 -[NSNotificationCenter postNotificationName:object:userInfo:] + 71
13 com.apple.AppKit 0x91c175c0 -[NSWindow _postWindowDidChangeBackingPropertiesAndDisplayWindowForPreviousBackingScaleFactor:previousColorSpace:] + 204
14 com.apple.AppKit 0x914f6a89 __67-[NSWindow _updateSettingsSendingScreenChangeNotificationIfNeeded:]_block_invoke + 259
15 com.apple.AppKit 0x91492330 NSPerformVisuallyAtomicChange + 212
16 com.apple.AppKit 0x9141e512 -[NSWindow _updateSettingsSendingScreenChangeNotificationIfNeeded:] + 210
17 com.apple.AppKit 0x9141de29 -[NSWindow _setFrame:updateBorderViewSize:] + 1143
18 com.apple.AppKit 0x91433d45 -[NSWindow _oldPlaceWindow:] + 585
19 com.apple.AppKit 0x91433389 -[NSWindow _setFrameCommon:display:stashSize:] + 2869
20 com.apple.AppKit 0x9143284c -[NSWindow _setFrame:display:allowImplicitAnimation:stashSize:] + 217
21 com.apple.AppKit 0x914f67b2 -[NSWindow setFrameOrigin:] + 445
22 _objc.so 0x0974d75d ffi_call_SYSV + 29
23 _objc.so 0x0974da79 ffi_call + 89
24 _objc.so 0x09766c89 PyObjCFFI_Caller + 2793
25 _objc.so 0x0978b17a PyObjCSelector_GetClass + 1162
26 org.python.python 0x063092bd PyObject_Call + 101
27 org.python.python 0x06390852 PyEval_EvalFrameEx + 18514
28 org.python.python 0x063923ab PyEval_EvalCodeEx + 1780
29 org.python.python 0x0632d76e PyClassMethod_New + 1751
30 org.python.python 0x063092bd PyObject_Call + 101
31 _objc.so 0x0978d79f PyObjCSelector_FromFunction + 2895
32 org.python.python 0x063092bd PyObject_Call + 101
33 org.python.python 0x06390852 PyEval_EvalFrameEx + 18514
34 org.python.python 0x063923ab PyEval_EvalCodeEx + 1780
35 org.python.python 0x0632d76e PyClassMethod_New + 1751
36 org.python.python 0x063092bd PyObject_Call + 101
37 _objc.so 0x0978d79f PyObjCSelector_FromFunction + 2895
38 org.python.python 0x063092bd PyObject_Call + 101
39 org.python.python 0x06390852 PyEval_EvalFrameEx + 18514
40 org.python.python 0x063905f4 PyEval_EvalFrameEx + 17908
41 org.python.python 0x063905f4 PyEval_EvalFrameEx + 17908
42 org.python.python 0x063923ab PyEval_EvalCodeEx + 1780
43 org.python.python 0x0632d706 PyClassMethod_New + 1647
44 org.python.python 0x063092bd PyObject_Call + 101
45 org.python.python 0x06390dfe PyEval_EvalFrameEx + 19966
46 org.python.python 0x063923ab PyEval_EvalCodeEx + 1780
47 org.python.python 0x0632d706 PyClassMethod_New + 1647
48 org.python.python 0x063092bd PyObject_Call + 101
49 org.python.python 0x063163c2 PyClass_IsSubclass + 4374
50 org.python.python 0x063092bd PyObject_Call + 101
51 org.python.python 0x0638b278 PyEval_CallObjectWithKeywords + 171
52 greenlet.so 0x067187c0 initgreenlet + 7408
53 greenlet.so 0x067177b6 initgreenlet + 3302
54 greenlet.so 0x06717c4d initgreenlet + 4477
55 org.python.python 0x063092bd PyObject_Call + 101
56 core.so 0x066b8aea 0x66a0000 + 101098
57 libevent-2.0.5.dylib 0x066e21c1 event_base_loop + 3450
58 libevent-2.0.5.dylib 0x066e24ce event_dispatch + 35
59 core.so 0x066a8f81 0x66a0000 + 36737
60 org.python.python 0x063901e4 PyEval_EvalFrameEx + 16868
61 org.python.python 0x063923ab PyEval_EvalCodeEx + 1780
62 org.python.python 0x0632d76e PyClassMethod_New + 1751
63 org.python.python 0x063092bd PyObject_Call + 101
64 org.python.python 0x063163c2 PyClass_IsSubclass + 4374
65 org.python.python 0x063092bd PyObject_Call + 101
66 org.python.python 0x0638b278 PyEval_CallObjectWithKeywords + 171
67 greenlet.so 0x067187c0 initgreenlet + 7408
68 greenlet.so 0x067177b6 initgreenlet + 3302
69 ??? 0x063fb5f0 _Py_ZeroStruct + 12