It is probably more than the ads. A few months back, someone on here told me about 'NoScript' for 'FireFox', it made a HUGE difference.
It blocks all kinds of scripts good and bad, and defaults blocking scripts on every website. You will need to train it as to what sites to allow partially or fully.
As an example, I have mine set to allow 'investorshub.advfn.com' but block 'advfn.com'. Unfortunately, all of the bells & whistles here are on 'advfn.com', such as pressing 'N' for 'Next post', most searches, and the formatting buttons to the left of the post entry screen. But in my opinion it is well worth it (see link below). If I temporarily allow 'advfn.com', several pop-up ads appear and my computer grinds to a halt.
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