I use a custom userChrome.css to render curvy tabs. Since I updated Firefox to 102 on Win10 the lower curves of each tab (except the leftmost corner) are not drawn properly anymore but stay straight.
@import url(userChrome-light_photon-australis.css); /* curved tabs */
So I won't dare to update my Linux Mint version of Firefox 101 yet. (FF102 on Win10 also introduced a cookies setting bug that risks privacy.)