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8 months agoHave a look at https://wiki.archlinux.org/title/Zram - a compressed block device in RAM that can be formatted as swap. There are various tools to set it up, maybe your distro already includes one of them. And htop has a meter for it, so you can see how effective the compression is (besides its own zramctl tool).
What would you need an addon for? If you enable the clipboard monitor, jdownloader automatically adds all downloads it finds from any link you copy.
Edit: If you don’t like the clipboard monitoring you can also use the Open With addon to explicitly add links.