Bug 1633399 Comment 2 Edit History

Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.

Original comment by
on 
It's Twitter that crashes. not the Firefox tab itself. Seemingly an exception occurs from a mutation observer callback.

```
exports (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
registerMutation (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
registerMutations (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
e (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
e (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
onCompositionStart (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
onCompositionStart (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_runWithPriority (https://abs.twimg.com/responsive-web/web/main.82ef4e44.js#10)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_flushControlled (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
exports (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_runWithPriority (https://abs.twimg.com/responsive-web/web/main.82ef4e44.js#10)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_flushControlled (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
a (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
p (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
O (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
O (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
C (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
P (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
R (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
kn (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
Ia (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
ze (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
Cn (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
En (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
pr (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
```
Revision 1 by
on 
It's Twitter that crashes, not the Firefox tab itself. Seemingly an exception occurs from a mutation observer callback.

```
exports (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
registerMutation (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
registerMutations (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
e (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
e (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
onCompositionStart (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
onCompositionStart (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_runWithPriority (https://abs.twimg.com/responsive-web/web/main.82ef4e44.js#10)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_flushControlled (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
exports (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#9)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_runWithPriority (https://abs.twimg.com/responsive-web/web/main.82ef4e44.js#10)
ta (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
unstable_flushControlled (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
_buildHandler (https://abs.twimg.com/responsive-web/web/bundle.RichTextCompose.3bbd68a4.js#1)
a (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
p (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
O (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
O (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
C (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
P (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
R (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
kn (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
Ia (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
ze (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
Cn (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
En (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
pr (https://abs.twimg.com/responsive-web/web/vendors~main.e0482f54.js#65)
```

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