I don't see how it's possible, unless you're a programmer. Anyway, i've seen people request to support both Linux[1] and Firefox[2]. But there's no indication the developer will do that and people who tried to compile face problem.
There is a code posted on their github page, but I guess this is just for extension.
git clone --depth 1 --branch main https://github.com/RabbyHub/RabbyDesktop.git RabbyDesktop
cd RabbyDesktop;
npm install
If there is source code available than you can build in in Linux, but on links you posted I see some people tried doing that and they run into problems.
Some code optimization is probably needed, but they are not so much active in posting updates, last one was posted in March.
I think community needs to step in and create something for linux.