This has been mentioned here before, but not for awhile. If you use Firefox, there is a great add on called Scrapbook Plus. With it, you can capture full web pages, save them to your hard drive, and view them with out internet access. So, say for example you wanted to capture a provider's ad on Eros, or a review here, you would be able to access them down the road if they were to go missing or taken down in the future.

Tried to link to the page, but since it is an https  instead of http address, can't. You can find it on the Firefox add ons page, just type in scrapbook plus.

Its very handy for capturing a cutie before she disappears from Eros or Backpage.  I have used it for naughty ads that you know will get removed eventually.