Release Notes for v39.8.8

Fixes

• Fixed an issue where DevTools would re-attach to the window when opened after previously being detached. #50818 ^{(Also in 40, 41, 42)}

Other Changes

• Backported fix for chromium:74266014. #50175
• Backported upstream v8 fixes for several maglev, inspector, and arm64 code-generation edge cases. #50993