> 2) It is easier (last I checked) than with Firefox to leave some config tabs open so I can quickly turn on/off javascript, images, and/or cookies for those sites where I need them (by exception list or temporary exception, and easy to manage it without a mouse once the tab is open; separately, I do change the search engine also, and create search keywords), and

I wouldn't want to switch everything on/off manually. I use the uMatrix extension which allows you to enable disable cookies, images, Javascript, iframes, etc. for each domain separately, and configure the exceptions permanently or temporarily. I have JS disabled by default, and enable it only for trusted sites or temporarily. Even on the sites I trust, Google Analytics scripts, etc. are disabled.