Pages

I'm at my wit's end here - I have stopped seeing many of the tabs on Facebook pages I visit. For example, the page of Disney Pixar only has sidebar links for main page, information, photos, videos and info+ads. Gone are links for events, posts, locations etc and this happens on every single page...

Random pages keep opening up on my android ZTE phone. When I check recent apps open they are not there at all! What should I do? If I have a virus, how would I go about deleting it?

I am wanting to read everything religion and make notes upon or within the pages to share with my friends and family or for quick access like high lighting text for offline use on android and pc