Sidebery's wiki describes[0] a method using a window "title preface" API, then using that preface in CSS selectors. https://github.com/mbnuqw/sidebery/wiki/Fir

Sidebery's wiki describes[0] a method using a window "title preface" API, then using that preface in CSS selectors. https://github.com/mbnuqw/sidebery/wiki/Firefox-Styles-Snippets-(via-userChrome.css)#dynamic-native-tabs https://github.com/mbnuqw/sidebery/wiki/Firefox-Styles-Snipp...