Unwanted hyperlink appears on all of my web photos

My website consists of my photographs. An unwanted Bing hyperlink (Click to Search) now appears on my photos, ruining them. Bing cannot see problem. My web host suggests that t is a browser add-on. How can I see what add-ons might be on my browser. If I find it, how do I get rid of it? My website is:

The hyperlink comes and goes to some extent, so look at several photos to catch. It takes three or so seconds to come up. Seems to be mainly in Gordon's Travels. How can I send you a screen shot? Am using Firefox 22.0 on an iMac with OS 10.7.5.

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