The closing paragraph on your link that heavily cites the Cochrane Library meta-analysis:

    “After all masking and public health measures stopped SARS-1 in its tracks in Toronto, I would view the Cochrane Library meta-analysis findings with a large degree of skepticism.”

and buried within:

    “Meta-analysis is a less than optimal methodology to apply to the issue of masking. Almost all included studies varied widely in their methodology, since it is very hard to ethically have a non-masking control group.”