There is actually no need to use Puppeteer. This can also be seen with Marionette enabled. Here the steps to reproduce: 1. Clone https://github.com/romainmenke/firefox-css-cyclic-imports-bug-001 2. Open `firefox-css-cyclic-imports-bug-001/tests/cycles/006/index.html`
Bug 1844683 Comment 4 Edit History
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There is actually no need to use Puppeteer. This can also be seen with Marionette enabled. Here the steps to reproduce: 1. Clone https://github.com/romainmenke/firefox-css-cyclic-imports-bug-001 2. Start Firefox with `./mach run` 3. Open `firefox-css-cyclic-imports-bug-001/tests/cycles/006/index.html` and observe that the square is green 4. Start Firefox with `./mach run --marionette` 5. Open `firefox-css-cyclic-imports-bug-001/tests/cycles/006/index.html` and observe that the square is red 6. Repeat step 2 and 3 and observe that the square is green again