Facebook Messenger scrambles input/characters

[sapphireweb]

Using version 0.1 (don't see a newer version)

URL: https://www.facebook.com/

Browser / Version: Firefox 92.0
Operating System: Windows 10
Tested Another Browser: Yes Chrome

Problem type: Desktop site instead of mobile site
Description: Desktop site instead of mobile site

Steps to Reproduce:

I am unable to tell if this issue was created the first time. Forgive me if this is a duplicate. I have 3 screenshots to provide.

The issue: When typing, the cursor began jumping back home after every single key stroke. I would have press the end key after every single key stroke. Did not matter whether it was in messenger, or entering a comment, creating a new post, etc. It is however, not consistent – meaning that sometimes it will correct itself in the middle. I have only noticed this on FaceBook.

Screenshot 1: Messenger
Screenshot 2: Creating new post on my feed.
Screenshot 3: Commenting to a post on my feed.

For the examples below, I typed the phrase “The quick brown fox jumped over the lazy dog

Disabling the add-on, resolved the issue.

[rugk]

Thanks a lot for your bug report.
As far as I read that, you seem to have an issue with Facebook and the letters get scrambled.

So am I correct that this breaks the whole input field. i.e. writing text is not at all?

Also I have some other questions:

• What does "See FireFox Bug report #83868" mean? I tried looking for that issue on Mozillas Bugzilla, but that's unrelated.
• Does "Tested Another Browser: Yes Chrome" mean you (manually) installed this add-on in Chrome and the issue does not happen there? If not, I guess you tested it without this add-on, where this issue won't happen then, of course.
• From your screenshots I judge that only Facebook Messenger (i.e. their chat) is affected. Everything else works. Is that correct?

BTW please mind to fill out the issue template you choose, when you open an issue the next time. This makes it easier to troubleshoot issues or understand feature requests etc. Thanks for providing a lot of details… in any way.

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Technically: BTW this sounds/looks very similar to Twitter (#4), where there is also such a strange jumping and scrambling of characters.

[tdulcet]

Yes, thank you for the bug report!

I can confirm the issue on Facebook, both when creating new posts and in Messenger. I tested the add-on multiple times on Facebook while I was developing it and did not have any problems, so this is a new issue. 😕

• What does "See FireFox Bug report #83868" mean? I tried looking for that issue on Mozillas Bugzilla, but that's unrelated.

I believe they were referring to this: webcompat/web-bugs#83868

Technically: BTW this sounds/looks very similar to Twitter (#4), where there is also such a strange jumping and scrambling of characters.

@rugk - Yes, this seems the same as #4, so we may want to update the Stack Overflow question in #62. Facebook and Twitter are likely using some problematic JS library for their respective editors.

[rugk]

Okay, so a good point would then be to find out what library they use.

Facebook likely React, but I dunno if Twitter uses that…

[rugk]

TODO:

• find out library used here