Nice, thanks for the reply. Looking at their site, it looks like they now support a true headless mode: https://docs.slimerjs.org/master/release-notes-1.0.html

Nice, thanks for the reply. Looking at their site, it looks like they now support a true headless mode: https://docs.slimerjs.org/master/release-notes-1.0.html https://docs.slimerjs.org/master/release-notes-1.0.html "With Firefox 56 and more, SlimerJS can be trully headless by adding the –headless option on the command line" So that could be an interesting thing to play with. I've thought about just having my sidekiq jobs spin up a docker container with the browser in it and then just limiting the amount of jobs at once for resource constraints, and now seeing your comment I think I might just give it a shot.