The only reason I gave it this rating is because I see how well your rating is and the comments people make but I can't get this working and I don't know if it is me or the product. I have activated it (specifically set facebook.com in list of sites for rules and it does appear in the list), I have closed the facebook.com tab and re-opened and I have re-started Firefox and nothing works. It worked for another site but when I went back to the tab after testing Facebook.com, the other site had returned to its normal, tiny text for mobile phone folk (I am guessing). I really, really, need this product as it would save me so much frustration in life (pathetic? lol) as I am constantly having to zoom in on pages that the text is microscopic for me!

Update: I am not sure what changed but I independently test three different sites outside of Facebook.com (the main culprit for not updating at all) and now everything is working according to the specifications of the product. I am going to report my review as I had only given it 3 starts and I am in no doubt of mind that it deserves 5 stars. Thank you and sorry.