strange Blue line appeared at the top of my blog

I don’t see a strange blue line at the top. Here is a screenshot of my screen viewing your website in FireFox. https://awesomescreenshot.com/005igg026

hmmm, do you think it could be something to do with the admin bar??

here is what i see – https://awesomescreenshot.com/06cil4b90

i have signed out of my blog and i still see the blue line.

Im also trying to install the attention grabber plugin (https://codecanyon.net/item/attentiongrabber-add-a-notification-to-your-site/242027) but it isnt working either…..