in theory your ad-blocker will probably have a little logo on your page, likely at the top somewhere: you click on it and it offers the possibility of removing it from the page or the website you're looking at.
Click on the symbol for the blocker (top-right) and follow instructions. You don't have to switch it all off necessarily, probably just for that site, depending on what you're using.
Eithe right click on the Adblocker icon and follow the instructions on there to allow specified sites or only work on certain sites as Togo says. Or click on settings , manage extensions and disable
I ignore all requests to turn off my ad-blocker. Most sites still let you continue, albeit with a banner at the bottom of the page. I say goodbye to any site that insists I turn it off.
My local online paper has a permanent banner to please turn off my adblocker across the bottom of the screen. Eventually I felt guilty and turned it off for that site and guess what - the advert(s) was even bigger than the first banner but was also right across the top as well as the bottom and down the sides and randomly in the middle - my available laptop viewing screen was down to about 10cms height. I turned the adblocker back on.