Save it to a usb drive, eject it, boot back to Linux, plug in the thumbdrive you saved it to and copy it over and then complete the steps outlined in @vasileios post at the same link which are from the terminal:
I would suggest first when you get it copied back over that you run: sudo apt update && sudo apt list --upgradable -y
If there are any updates to install: sudo apt upgrade -y
and I also like to run sudo apt autoremove
to clean out any old stuff before installing anything else.
cd Downloads (or wherever you copied it to) chmod +x ./install_brave_browser.sh ./install_brave_browser.sh
Provide sudo/root password if prompted, not “connie” password.( the one you made during the install for root) and watch it go.
On the https I included, there is a line code that was included in vasileios post. follow the instructions and run the command line he provides in the post to auto run the download. This is what I failed to do the first few attempts on my last post, that MrDeplorableUSA was helping with. If you don’t run the auto script that vasileios provides, it doesn’t work.