tl;dr Run sudo apt install --install-recommends linux-generic-hwe-24.04 in the terminal to get the latest kernel version available (v6.11.x)

Linux Mint uses whatever kernel the latest Ubuntu LTS (24.04) is using which happens to be v6.8.x. Ubuntu LTS and thus Linux Mint will by default remain on this kernel version for two years after its release i.e. until the release of the next major version of Ubuntu LTS. This is for stability (hence the LTS moniker - Long Term Stable). You do get security updates and fixes in point releases of the kernel.

So yes kernel versions are tied to your Linux Mint version. But Ubuntu also offers newer kernel versions, however those will be less stable so are not recommended unless you have some hardware that doesn’t work with your current kernel version. Just run sudo apt install --install-recommends linux-generic-hwe-24.04 in the terminal which will install v6.11.x. This will also install newer versions of drivers (mesa) and other related stuff. Note that this kernel version is not fixed, you will get updated to a newer major kernel version every 6 months.

*And if you have an Nvidia GPU, you would also want to install the Nvidia driver for the newer kernel. I think Mint provides an app for that (drivers or something).

really nice video, covers the whole spectrum of things

You are just being silly, there is no way its going to “seriously damage the entire Linux project”. There is nothing too technical about the whole R4L drama (esp. the recent one), its mostly political opposition to Rust from some C folks. We have seen this before in Linux (Wayland/X11, systemd/sysv, etc.).

its flatpak run org.mozilla.firefox