This is a simple question probably asked before, but can you make the linux torbrowser launcher, install an older version of torbrowser? The torbrowser launcher settings give no option to do this, so it just installs the latest. Regardless of older versions having more bugs and vulnerabilities, you can install the older versions manually, but this doesn't seem the same as when it is installed using the launcher.
That's not possible unless you were to hack the code of torbrowser-launcher yourself. The reason for that is because every new version includes code fixes to help ensure your anonymity online. Using an old version would make yourself more at risk.
However, it's your computer and you can do with it as you like. Here is the original github if you want to tinker with it.