Cannot load more than 3 maps even if on different tabs

[mintuhouse]

If I attempt to load more than 3 maps simultaneously (tested in Firefox on Ubuntu), even if not on same page, the tiles for latest one won't load. If I close the first tab, the map is loaded on 4th without refreshing.
I sometimes get following warning in browser console. It may be related.

Exceeded 16 live WebGL contexts for this principal, losing the least recently used one.

The number when tested in Chrome seems to be 8.

I am using mapbox with turbolinks (rails), after 3 back and forth switches betweed pages, I no longer see the map.

Is there a way to manually disable webgl or hide it on unload?

[lucaswoj]

Closing in favor of #2656 which has more discussion & context.