Too many tabs open ? Otto Tabs automatically groups and removes tabs for you. Works with all chromium based browsers (Chrome, Opera, Vivaldi). Vivaldi stacking feature is even supported ! See website for more informations. Changelog : v0.2 [fix] toggling configuration now works properly [feat] allow grouping by full domain or subdomain [feat] sync otto settings to chrome storage v0.1.2 [fix] tab was not correctly moved out of a stack on Vivaldi v0.1.1 [fix] grouping feature wasn't working properly under some circumstances v0.1.0 [fix] your pinned tabs are left untouched v0.0.4 [feature] use Vivaldi stacking feature if available on your browser !