This looks like the memory regression is from code being loaded in the TranslationsChild. I was able to reduce this by about 30% through breaking out code into a separate script and lazy loading it.
Bug 1836039 Comment 3 Edit History
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This looks like the memory regression is from code being loaded in the TranslationsChild. I was able to reduce this by about 30% through breaking out code into a separate script and lazy loading it. I'm collecting my results in this spreadsheet: https://docs.google.com/spreadsheets/d/1zeCdnSCngoUMG2mzNymardEb6jPNXtpoo30XnLvyaz0/edit#gid=0