I'm sorry I didn't explain myself properly and I've been unable to come back sooner.
I was using Adblock and all was well, when I noticed that I was seeing lots of annoying ads on my Yahoo email page. After searching for answers I found a 4 line code to add to the Whitelist in Adblock. After doing this I went back and the ads were still there, so I went back to Adblock to check that I'd put the code in correctly and the last 2 lines had been deleted.
I did this a few times and then after another search found that Adblock Plus would stop Yahoo ads and it worked, so I downloaded Adblock plus and have version 1.13.4. I use a site called swagbucks.com, where I make a little money doing surveys, watch videos etc. It isn't much, but it amuses me and I find it fun. They offer an extension they call a swagbutton, which I've downloaded, it sits on the top taskbar, next to the adblock symbol. I click on it and it opens up and it runs videos and then sits on the bottom taskbar. If I open with adblock it runs the videos, but if I open with adblock plus, it won't run the videos. I can't put the URL in the whitelist because being an extension it doesn't have one. I've tried different versions of swagbucks and swagbucks button etc. but nothing will allow the videos to run. I have an account on the swagbucks site and other parts of the main site are running the same, it's just this extension which is being blocked from running somehow.
I really like adblock plus and want to keep it, but at the moment I have to swap and change between adblock and adblock plus, depending on what I'm doing.
I was really shocked that Yahoo was able to delete something on my pc. I use a yahoo email for this swagbucks site, but I'm thinking of changing it because of this issue.
I have Chrome version 62.0.3202.94
Adblock plus version 1.13.4
I hope I've made it a little clearer, so that you'll be able to help me.
Thank you so much for trying to help, I'm sorry I'm not more computer literate.