In Firefox, the bounding box in Content tab of an activity doesn't match text size when Hebrew characters are present

Describe the bug

When adding text content to any activity which allows freeform content, if the text contains Hebrew characters, the bounding box size is miscalculated.

This also causes the text to not be positioned in the center, instead its centered on text which is not Hebrew characters.

To Reproduce

Steps to reproduce the behavior:

1. Using Firefox, Create a JIG
2. Add a module which allows text content to be added, like Listen and Learn
3. On the Content tab, click "Insert textbox"
4. Note that with the default text "Shalom שָׁלוֹם", the bounding box is as wide as "Shalom" and the height is for 2 lines.

Expected behavior

Bounding box should match the content.

Screenshots