I don't have any I'm afraid, but there are some articles about migrating from V2 to V3 from other lovely folks that you might be interested:
Main gotcha with MV3 is if you plan on supporting Firefox: service workers aren't currently supported in add-ons :(.
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I don't have any I'm afraid, but there are some articles about migrating from V2 to V3 from other lovely folks that you might be interested:
Chrome Extensions: Migrating to Manifest v3
Paula Santamaría ・ Mar 26 ・ 7 min read
Chrome Extension Tutorial: Migrating to Manifest V3 from V2
Shahed Nasser ・ Feb 11 ・ 8 min read
Main gotcha with MV3 is if you plan on supporting Firefox: service workers aren't currently supported in add-ons :(.