no age shaming

[ImprovedTube]

if you fill in the blank, i can make another PR or commit like: chrome.runtime.onInstalled.addListener(function(installed){if(installed.reason=='install'){if 116 > Number(navigator.userAgent.match(new RegExp(Chrome|Firefox + '/([0-9]+)'))){alert("[Just to make sure:] Some of our features might require chrome version 116+.... _______________________") } ( - or rather add it precisely, when that feature is first enabled as indicated by its button or storage change.)