Firefox multiple rows

https://github.com/Aris-t2/CustomCSSforFx

For …\chrome\config\general_variables.css
Change to:
–tabs-lines: 6 !important;


For ../userChrome.css
Uncomment :

/* @import “./css/tabs/tabs_multiple_lines.css”; /**/
@import “./css/tabs/tabs_multiple_lines_force_newtab_button_visibility.css”; /**/