The initial zoom to access the web from a mobile device in portrait orientation does not fit the device width. The user is forced to change the zoom to browse the web. If you switch to landscape orientation, zoom fits correctly in Firefox but not in Chrome.

If you access the web in landscape orientation the initial zoom is correct. If you switch to portrait orientation, zoom remains correct in Firefox but not in Chrome.

Browsers: Chrome, Firefox
Device: Google Nexus 6P, Android 7.0