Firefox crashing from OOM due to the Lightbeam extension

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Since Firefox crashed shortly after starting up, It would have been a bit impractical to open about:memory.

I’m quite aware that the add-on updated, and it’s precisely when it began occurring. Before that, I had no problems. Thank you for looking into it and sharing anyway!

EDIT : I solved it by removing the add-on, restarting Firefox, and reinstalling it. Everything works again.
The complete steps were :

  1. starting Firefox in the terminal with
    firefox --safe-mode
  2. removing the add–on,
  3. closing Firefox,
  4. restarting Firefox normally,
  5. installing the add-on again.
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