Hello simon.eden, yes it is safe to view porn photos as it is safe to any other browser, as you correct said, your ESET SMART SECURITY will pop up if you are in a dangerous sites, it is, basically, how smart and correct your security software behave.

Extra precautions in firefox :

Click the 3-bar menu button > Options > Content panel > check [v] Block Pop-up Windows

also, in Options > Privacy panel > Tracking > check [v] Tell sites I do not want to be tracked

in Options > Security panel > check [v] Warn me when sites try to install add-ons, check [v]Block reported attack sites, check [v] Block reported web forgeries

thank you

Thankyou Firefox - you were very helpful... it's not like I view porn photos every day, about once a week but I go nowhere near - PORN VIDEOS!!! - as they can cause bad damage to your computer...even if you do have a good anti virus like ESET...I also have a printer as well, so I can copy photos & therefore not use the computer too much, it's okay if i'm just browsing normal stuff & information - YOUTUBE etc - emails to my daughter so it is very important that I look after my computer, after all, it is a MICROSOFT WINDOWS 8.1 DESKTOP...a very good computer... thanks & bye for now...Simon Eden