Hi everyone, I'd like my new tab page to be a local html file (that uses .js scripts and local image files so I cannot use [https://addons.mozilla.org/fr/firefox/addon/custom-new-tab-page/ this add-on] or [https://addons.mozilla.org/fr/firefox/addon/new-tab-override/ that one]). A few versions of Firefox ago, the method described [[https://support.mozilla.org/en-US/questions/1251199|here]] worked perfectly fine but it's not the case any more. I'm using MacOS version 11.2.2 and the latest version of Firefox (87.0 64 bits). Thanks in advance to anyone who will be able to provide help! Best, Léo