

Well thats because as soon as you search you are actually using a website. If the website doesnt support darkmode or was someday configured to be whitemode, then it will always show up bright. If the website doesnt support darkmodes: use the newest install that comes in a few days the 120 version. Or switch to the nightly-installation where you can already now install plugins/extentions. Then install the darkreader extention. Done. Ezpz
Well thats weird. Maybe try the nightly build, they have additional features and patches. Maybe its a weird bug that got patched with this version or it is a random problem that occurred whilst the installation.