ognarb added a comment.
+1 but I couldn't test it (changed my distro recently and can't get pbi to work yet). The js class is available in firefox since Firefox 45 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes#Browser_compatibility so it should work in firefox esr REPOSITORY R856 Plasma Browser Integration REVISION DETAIL https://phabricator.kde.org/D24165 To: broulik, #plasma, fvogt, ognarb Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart