first tab of chromium always shows loading icon and is never completely rendered. except that it does everything properly. example - https://imgur.com/a/obg38lu
Could you diagnose: are you able to open any other website?
It looks like you trying to open http://manjaro.org instead of https://manjaro.org: may be your network settings restricts http connections or manjaro.org lost redirection to https.
Try to do elementary diagnosis at least you already clearly know.