Avoid at all cost.
Mozilla firefox is affiliated with the www.mywot.com scam via their add-on.
Do a Google search on mywot.com and you will quickly see what i mean.
I believe www.mywot.com is a scam and a fraud. They knowingly rate good sites bad, and even have some porn sites rated good and "child Safe."
They encourage false posts and basically are evil people who deserve to go to H***.
AVOID AT ALL COST.