There are numerous new features coming in Firefox 119. For instance, it will now have the ability to open multiple tabs at once and support profile migration from Chrome. However, one small feature that deserves attention is the fix for bug 148624, where tooltips would stubbornly remain even when the Firefox window was minimized or in the background.
This bug was first reported way back in 2000 and has had multiple reports since then. Finally, it has been consolidated into a single bug with the number 148624.
The difficulty with this bug is that it doesn’t occur for everyone. Some people claim it is a rare occurrence, while others say they encounter it every day. However, thanks to the efforts of user fanzhuyifan, who provided the necessary steps to reproduce the bug and even submitted a patch to fix it, this bug has finally been closed, putting an end to its 24-year-old legend.
TLDR: Firefox 119 is introducing new features such as opening multiple tabs at once and supporting profile migration from Chrome. However, the noteworthy improvement is the fix for bug 148624, which caused persistent tooltips. This bug, first reported in 2000, has been an ongoing issue but has now been resolved after 24 years, thanks to the contribution of user fanzhuyifan.