Update to Firefox v118 / Playwright 1.40

[tmbrbr]

This PR merges the Firefox upstream branch to v118, corresponding to Playwright patches v1.40

https://github.com/microsoft/playwright/blob/release-1.40/browser_patches/firefox/UPSTREAM_CONFIG.sh

This will fix #182

[cla-assistant]

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1 out of 22 committers have signed the CLA.

✅ tmbrbr
❌ Mozilla Releng Treescript
❌ iainireland
❌ stransky
❌ emilio
❌ gregtatum
❌ mikeconley
❌ brennie
❌ tnikkel
❌ padenot
❌ bradwerth
❌ jesup
❌ CosminSabou
❌ mkmelin
❌ nordzilla
❌ lsalzman
❌ rvandermeulen
❌ daleharvey
❌ bobowen
❌ jmaher
❌ groovecoder
❌ Pehrsons

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