New top story on Hacker News: Ask HN: What are your favorite browser extensions/add-ons for Firefox or chrome?

Ask HN: What are your favorite browser extensions/add-ons for Firefox or chrome?
2 by atulatul | 1 comments on Hacker News.
What are your favorite/preferred browser extensions/ add-ons?Firefox, Chrome. Primarily productivity focused. But other areas are fine, too. Also mention specific customizations of these, if any. Moderators, please edit suitably, as this is my first post here.