Both Chrome and Firefox have been engaging in community-based testing to try to find sites that break due to this version increment. The webcompat project has

Both Chrome and Firefox have been engaging in community-based testing to try to find sites that break due to this version increment. The webcompat project has a list of some compatibility issues reported so far: https://webcompat.com/issues?page=1&per_page=100&state=open&stage=all&sort=created&direction=desc&q=label:version100 https://webcompat.com/issues?page=1&per_page=100&state=open&...