When I start a reply in the Waterfox browser even on this forum, the cursor does not appear when typing, making it difficult to reposition the cursor to edit text:
The cursor displays fine when I start a new topic or private message, but does not appear when I reply to an existing topic or private message.
This issue does not occur on Chrome or Edge. On the Discourse based forum I take care of, someone mentioned the cursor does not appear on their Firefox browser when replying, although the cursor appears for me in Firefox.
To replicate this issue, try to reply to any topic here in the Waterfox 64-bit browser, such as the portable version which is also affected.