RichText formatting popup does not appear in some cases in some browsers

Reportedly, in Firefox on Mac, when selecting text from right to left, the formatting popup appears normally, but when selecting text from left to right it does not.

Needs to be tested, maybe using browserstack

Start by reproducing the reported behavior in Firefox on Mac, selecting text from left to right and then right to left. Use BrowserStack if needed to compare browsers, and consider the issue done when the RichText formatting popup appears consistently for both selection directions.

Written by the indexing model from the issue text.