Increase font size up to 200% larger on Web by using Wudooh (browser extension)
I developed a browser extension that fixes the small font size issue on the web and gives you options to customize font, among other things. It is called Wudooh and is on Chrome and Firefox (this wouldn't work on the app unfortunately, just browsers).
Now for some reason the font changes aren't happening on the Duolingo site (it works everywhere else) but the size changes are happening so at least that will make things much more pleasant and clearer for you.
It is absolutely free and open source, I gain nothing from this other than the satisfaction of knowing I have helped others learn and use Arabic, so please use it and help your eyes.
GitHub repo: https://github.com/basshelal/Wudooh
Let me know if 200% increase is enough or if I should increase the limit to 300% since the default size on here is insultingly small meaning 200% isn't as big as it should be.
Many thanks and peace to you all, good luck in your studies :)