https://connect.mozilla.org/t5/ideas/split-screen-tab-in-tab-feature-view-more-than-one-tab-at-once/idi-p/3989 https://connect.mozilla.org/t5/ideas/split-screen

https://connect.mozilla.org/t5/ideas/split-screen-tab-in-tab-feature-view-more-than-one-tab-at-once/idi-p/3989 https://connect.mozilla.org/t5/ideas/split-screen-tab-in-tab...