STR: - Enable Tracking Protection (avoid ads that might have video) - Load https://www.vox.com/science-and-health/2018/7/24/17606958/meat-cheese-surplus-visualized in Recording mode Site loads enough to be visible, then throws: Assertion Mismatch: Thread 1 Recorded: CFRelease [67680955,67498] Replayed: CFRetain ### _ZN7mozilla12recordreplay28AutoRecordReplayFunctionVoid17StartRecordReplayEv ### _ZN7mozilla12recordreplayL11RR_CFRetainEm ### _ZN14MacOSFontEntryC2ERK12nsTSubstringIDsEP6CGFontN7mozilla11WeightRangeENS6_12StretchRangeENS6_15SlantStyleRangeEbb ### _ZN22gfxMacPlatformFontList16MakePlatformFontERK12nsTSubstringIDsEN7mozilla11WeightRangeENS4_12StretchRangeENS4_15SlantStyleRangeEPKhj ### _ZN16gfxUserFontEntry16LoadPlatformFontEPKhRj ### _ZN16gfxUserFontEntry24FontDataDownloadCompleteEPKhj8nsresult ### _ZN16nsFontFaceLoader16OnStreamCompleteEP15nsIStreamLoaderP11nsISupports8nsresultjPKh ### _ZN7mozilla3net14nsStreamLoader13OnStopRequestEP10nsIRequestP11nsISupports8nsresult ### _ZN19nsCORSListenerProxy13OnStopRequestEP10nsIRequestP11nsISupports8nsresult ### _ZN7mozilla3net18nsHTTPCompressConv13OnStopRequestEP10nsIRequestP11nsISupports8nsresult ### _ZN7mozilla3net16HttpChannelChild15DoOnStopRequestEP10nsIRequest8nsresultP11nsISupports ### [67680955,67498]

Same error on https://www.fastcompany.com/90202971/why-quitting-your-job-without-a-backup-plan-can-help-your-career and other sites

Hi, sorry for not replying earlier, I just saw this bug (watching the Web Replay component now, oops). I just tried both of these sites and am not able to reproduce this problem. Does it still fail for you on Nightly or a recent m-c build? If so, I can add some diagnostic asserts (to the ash repository, probably) to see if we can track the problem down.