Question 1: Have you ever returned to a favorite online article, days or months later, only to find it changed? The blog edited, the editorial removed, the old news piece gone?
Question 2: Have you ever needed to reference a webpage, for a paper or dissertation? Did you waste minutes searching for the website's vitals, the date added and last modified, etc?If you answered yes to either of these questions, then you are doing it wrong. You need an online source manager. I am a Chrome girl, so I stayed away from Zotero for years. The original Zotero was a Firefox plugin. But recently they came out with a new stand alone Zotero version for Mac, Windows, and Linux.
I use this standalone version and I really like it. It is great, with one click I can save a website, along with all its vitals. Zotero also takes a HTML snapshot of the webpage. This enables me revisit a website, months or years later, even if the online version has changed.