XNote constantly causes Thunderbird to crash on Mac

[zevrix]

XNote constantly causes Thunderbird crashes on Mac. XNote 3.1.3 macOS 10.15, 11.x Thunderbird 78.7.0

By now I'm confident it's XNote: I especially ran Thunderbird with no add-ons for a week - no crashes at all. Re-enabled XNote (which is my only plug-in): crashes returned right away.

Happens at least once a day, sometimes multiple times.

The following actions can trigger the crashes: Save email draft, invoke Reply command, Send email, new email arrived (even if Thunderbird in the background).

I attached a crash report below.

I want to mention that I love XNote, use it for years and find it indispensable. I sent a donation too.

All the problems started with the recent drastic overhaul of TB (was it version 78?), which at first didn't support XNote at all.

Crash report is below, please let me know if you need more info. Should I report this bug on Bugzilla too - or is it XNote issue?

AdapterDeviceID: 0x67df AdapterVendorID: 0x1002 Add-ons: xnote%40froihofer.net:3.1.3,%7B0D2172E4-C5AE-465A-B80D-53A840275B5E%7D:2.0.3,wetransfer%40extensions.thunderbird.net:2.1.0,default-theme%40mozilla.org:1.0,google%40search.mozilla.org:1.0,amazon%40search.mozilla.org:1.1,bing%40search.mozilla.org:1.0,ddg%40search.mozilla.org:1.0,wikipedia%40search.mozilla.org:1.0 BuildID: 20210126033722 ContentSandboxCapable: 1 ContentSandboxLevel: 1 CrashTime: 1612287366 EventLoopNestingLevel: 1 FramePoisonBase: 9223372036600930304 FramePoisonSize: 4096 InstallTime: 1611897783 Notes: FP(D00-L1000-W00000000-T000) WR? WR- OMTP? OMTP+4 GL Layers? GL Context? GL Context+ GL Layers+ ProductID: {3550f703-e582-4d05-9a08-453d09bdfdc6} ProductName: Thunderbird ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 35815 StartupCrash: 0 StartupTime: 1612251554 TelemetryEnvironment: {"build":{"applicationId":"{3550f703-e582-4d05-9a08-453d09bdfdc6}","applicationName":"Thunderbird","architecture":"x86-64","buildId":"20210126033722","version":"78.7.0","vendor":null,"displayVersion":"78.7.0","platformVersion":"78.7.0","xpcomAbi":"x86_64-gcc3","updaterAvailable":true},"partner":{"distributionId":null,"distributionVersion":null,"partnerId":null,"distributor":null,"distributorChannel":null,"partnerNames":[]},"system":{"memoryMB":40960,"virtualMaxMB":null,"cpu":{"extensions":["hasMMX","hasSSE","hasSSE2","hasSSE3","hasSSSE3","hasSSE4_1","hasSSE4_2","hasAVX","hasAVX2","hasAES"]},"os":{"name":"Darwin","version":"20.1.0","locale":"en-US"},"hdd":{"profile":{"model":null,"revision":null,"type":null},"binary":{"model":null,"revision":null,"type":null},"system":{"model":null,"revision":null,"type":null}},"gfx":{"D2DEnabled":null,"DWriteEnabled":null,"ContentBackend":"Skia","Headless":false,"adapters":[{"description":null,"vendorID":"0x1002","deviceID":"0x67df","subsysID":null,"RAM":0,"driver":null,"driverVendor":null,"driverVersion":null,"driverDate":null,"GPUActive":true}],"monitors":[{"screenWidth":2560,"screenHeight":1440,"scale":2}],"features":{"compositor":"none","hwCompositing":{"status":"available"},"gpuProcess":{"status":"unused"},"wrQualified":{"status":"blacklisted:FEATURE_UNQUALIFIED_WEBRENDER_MAC"},"webrender":{"status":"opt-in"},"wrCompositor":{"status":"disabled"}}},"appleModelId":"iMac18,3"},"settings":{"blocklistEnabled":true,"e10sEnabled":false,"e10sMultiProcesses":8,"telemetryEnabled":false,"locale":"en-US","intl":{},"update":{"channel":"release","enabled":true},"userPrefs":{"browser.cache.disk.capacity":1048576,"browser.search.region":"CA","fission.autostart":false,"general.smoothScroll":false},"sandbox":{"effectiveContentProcessLevel":1},"addonCompatibilityCheckEnabled":true,"isDefaultBrowser":null},"profile":{}} ThreadIdNameMapping: 5:"Gecko_IOThread",8:"Socket Thread",9:"Permission",10:"JS Watchdog",12:"JS Helper",13:"JS Helper",15:"JS Helper",11:"JS Helper",17:"JS Helper",16:"JS Helper",14:"JS Helper",18:"JS Helper",20:"Timer",21:"Cache2 I/O",22:"Cookie",24:"Worker Launcher",25:"Compositor",26:"ImgDecoder #1",27:"ImageIO",28:"IPDL Background",29:"DataStorage",30:"cert_storage",31:"DOM Worker",34:"mozStorage #1",37:"StyleThread#2",35:"StyleThread#0",36:"StyleThread#1",38:"StyleThread#3",39:"StyleThread#4",40:"StyleThread#5",42:"ImageBridgeChld",45:"TRR Background",46:"HTML5 Parser",47:"localStorage DB",48:"QuotaManager IO",53:"ImgDecoder #2",54:"mozStorage #4",56:"IMAP",57:"IMAP",58:"IMAP",59:"IMAP",60:"IMAP",62:"IMAP",63:"IMAP",64:"IMAP",65:"IMAP",66:"IMAP",71:"mozStorage #5",73:"mozStorage #6",78:"mozStorage #7",79:"mozStorage #8",78:"URL Classifier",71:"ImgDecoder #3",72:"ImgDecoder #4",72:"mozStorage #9",72:"DNS Resolver #32",67:"DNS Resolver #40",66:"IMAP",67:"DOM Worker",68:"IMAP",72:"StreamTrans #1853",69:"StreamTrans #1856", Throttleable: 1 UptimeTS: 35812.23562711 Version: 78.7.0 useragent_locale: en-US

This report also contains technical information about the state of the application when it crashed.