Comment by 0x38B

A solution for this is a JS bookmarklet that enables zooming:

    javascript:document.querySelector('meta%5Bname=viewport%5D').setAttribute('content','width=device-width,initial-scale=1.0,maximum-scale=10.0,user-scalable=1');

I keep this on my bookmarks bar and use it most often to zoom in on text to read it better.