• about:config dans l'URL
• Doc about:config de Thunderbird
• Other Thunderbird doc
• Disable emoji font
• More about configuring about:config

Disable autoplay of videos - Source

in about:config you can set media.autoplay.default to 1 in order to block automatic playback on all pages or set it to 2 to decide on a per domain basis.

media.autoplay.default
media.autoplay.allow-muted // Autoriser autoplay pour vidéos mutées, mettre false

Désactive openVR, empêche SteamVR de se lancer pour rien sur facebook ?

dom.vr.openvr.enabled

Désactive l’auto-remplissage relou quand on tape dans la barre de recherche - Doc

browser.urlbar.autoFill

Empêche backspace d'ouvrir la page précédente

browser.backspace_action // 0: Goes back in history | 1: Acts as Page Up | 2 (and above): Does nothing

WebRTC (needed for Discord in browser) Source

media.peerconnection.enabled // boolean

Disable the need to press enter after clicking on the search engine in the bar : Source

browser.urlbar.update2.oneOffsRefresh // false

• Profiles data
• Change icon theme (old ?)
• Custom CSS for icons Idea

Settings/Options > Advanced > General > Config Editor…

toolkit.legacyUserProfileCustomizations.stylesheets > true