4749: Textbox Firefox on Android broken

Misery

What version are you running?

3.0.8

What's the URL of the page containing the problem?

https://reviews.reviewboard.org/r/9502/diff/

What steps will reproduce the problem?

  1. Open Firefox on Android
  2. Go to diffviewer
  3. Click to open an issue
  4. Try to type at least two words
  5. After every "space" the previous word will be removed

What is the expected output? What do you see instead?

Normal input like on Chrome or Desktop-Firefox

What operating system are you using? What browser?

Android 8, Firefox 62.0.2

Please provide any additional information below.