wrong default pref values in Tor Browser 8.0

The default values for some preferences are wrong in Tor Browser 8.0. For example, browser.dom.window.dump.enabled has a default value of true.

Maybe an issue similar to legacy/trac#27472 (moved) is affecting our desktop builds as well? See: https://dxr.mozilla.org/mozilla-esr60/source/modules/libpref/init/all.js#1090 where MOZILLA_OFFICIAL is used to choose some pref values.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information