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by yjftsjthsd-h 339 days ago

  PROFILEDIR="$(mktemp -d)"
  firefox --no-remote  --profile "$PROFILEDIR" --screenshot $PWD/output.png https://xkcd.com
  rm -r "$PROFILEDIR"
(You don't have to create and destroy a profile directory every time, but it's cleaner to do that way and you need one per instance you're going to run anyways)