for Messenger to track when something is pasted to the text box. Pasting between a pair of dots can help if set to false.
network.cookie.cookieBehavior = 0 or 4, != 1 and 2 (default 4 meaning blocking cross-site cookies and social media trackers, 0 means accepting all cookies, whether from originating site or not)
for Messenger to stay signed in,
for CodeReady (OpenShift with Eclipse Che) to open a workspace.
network.http.referer.XOriginPolicy = 0 (send Referer header whether the hostnames match or not)
for iCloud.com to be able to login. When the user is logged in already, it’s not required anymore.
privacy.firstparty.isolate = false (tracking across domains)
for Grammarly plugin to stay signed in,
for Disqus on websites to work.
privacy.resistFingerprinting = true
makes it a requirement for websites to ask for HTML5 canvas extraction permission without which text in Notes on iCloud.com is not displayed properly,
that permission is also required for Whatsapp Web version to show the QR code,
makes Firefox to report UTC time to websites,
makes Zoom show a white screen instead of the video and shared screen,
fixes the user-agent to version 78 and Windows 10.
webgl.disabled = false
for Notes on iCloud.com to open,
for Zoom to show videos.
WebRTC is required to call in Messenger. media.navigator.enabled is not.