매니페스트 V3로 마이그레이션1
https://github.com/cbcruk/webext/commit/cbb36355871fb36d5f6c21752aae3400d2a97abf#diff-0f354ef5fd807996fa3f5a7a83ceb74025aa8f85862e321b8938988031e99711L3-L25 ↩