[orca-list] Orca hangs or crashes while reading text in contracted braille in Firefox

[Jason White <jason jasonjgw net>]

Running Orca 3.30.1 from the Arch Linux repository, I turned on contracted
braille, and enabled word wrap to prevent splitting of words between braille
lines.

Reading a document in Firefox worked well until I used the reverse panning
button on the display to move bakcwards, which seemed to hang or crash Orca. I
haven't collected debug output, but I can if this isn't already a known issue.
Orca needed to be restarted.

I can also move to a current version from Git if that helps.