Side mouse buttons don't behave/navigate as expected in yomitan popup on Firefox

[Xiphiasar]

I just switched to Firefox and have found that the back button and forward button don't behave as they should/don't behave how they do in chromium browsers. By back and forward buttons I'm referring to the two side buttons standard on a gaming mouse: MOUSE4 and MOUSE5. Clicking them in a regular browser page will go forward or back a page. In chromium browsers if you click a Japanese word inside the yomitan popup to see the definition of that word you can then click the back button and go back up to the previous definition(s)/level(s). Forward works as well. When I try that in Firefox the entire page goes back instead of the popup and I have to reload the page. It's quite annoying.

This is easily reproducible as long as you have a mouse with side buttons but you do have to enable "Search terms when clicking text from the results list" in popup behavior.
Yomitan 24.9.16.0