Since request #42610, Tuleap has supported Firefox 128 and Chrome 127, for about 15 months. Those browser versions are not anymore in the extended support range of their vendors. We will raise the minimum versions Tuleap supports to the current Firefox ESR version at the time of writing, and a version of Chrome that was released at about the same time: Firefox 153 and Chrome 150.
Note that there are tools available to help determine these versions:
There is also a handy tool to determine the commit revision for nixpkgs to install a specific version of a package (for example firefox 153): https://www.nixhub.io/