I'm using ublock origin on my main (Chrome) browser. I've got the following in its settings under My Filters,Yes - I agree it is probably Ublock Origin.
I can't remember what I did to put them there, or even exactly what they mean, but may help.
! 2021-02-04 https://www.pedelecs.co.uk
www.pedelecs.co.uk##.js-lbImage-attachment40610.lbContainer-zoomer
||www.pedelecs.co.uk/forum/attachments/5377a7a4-68d7-40be-a1cd-3e4273d84918-jpeg.40610/$image
! 2021-02-04 https://www.pedelecs.co.uk
www.pedelecs.co.uk##.js-lbImage-attachment40622.lbContainer-zoomer
||www.pedelecs.co.uk/forum/attachments/5dfc09df-70f1-4439-92e9-70c74301dcec-jpeg.40622/$image