you probably only compile on one thread if you have a default /etc/makepkg.conf
though compiling a firefox browser on 12+ threads still takes several minutes up to half an hour
(try doing that with a chromium browser, thats hours rather than minutes)
The other day I died of old age compiling Librewolf from the AUR
What’s wrong with librewolf-bin? Would you choose the Flatpack or the bin from the AUR?
I ended up going with librewolf-bin. The flatpak version had some issues for me because my configs are a spaghetti nightmare
Install librewolf-bin
you probably only compile on one thread if you have a default /etc/makepkg.conf
though compiling a firefox browser on 12+ threads still takes several minutes up to half an hour
(try doing that with a chromium browser, thats hours rather than minutes)