Google, Mozilla working on letting web apps edit files despite warning it could be 'abused in terrible ways' November 23, 2018 https://www.techrepublic.com/articl...spite-warning-it-could-be-abused-in-terrible/
Sounds like a bad idea, but you should always block the browser from getting access to private folders with a file/folder protection tool.
Google moves closer to letting Chrome web apps edit your files despite warning it could be 'abused in terrible ways' Using the new Native File System API, web apps would be able to read and save files, as well as gather info on files stored on your device August 23, 2019 https://www.techrepublic.com/articl...-warning-it-could-be-abused-in-terrible-ways/
Chrome 78 allows sites to edit local files November 1, 2019 https://www.androidpolice.com/2019/...l-files-read-verification-sms-texts-and-more/