BTW - started testing some of these web apps:

SalesForce (Lightning): is working fine, but loading VERY slow (--> need faster machine/more RAM)

GoogleDrive: Also seems to work - but is way too slow to actually work with it (--> need faster machine/more RAM)

YouTube (okay, so this is nice-to-have - since I use it to listen to music while I work): works fine - a bit slow, but fine

So far, it looks like the browser can do it, and so can MorphOS. The hardware is just not up to it. Looking forward to testing more on a faster Mac G5.