Google PageSpeed Insights : Displays any site’s PageSpeed score
Serpstat : Instant SEO keyword research and competitive analysis
Ahrefs SEO Toolbar : A flexible SEO extension that’s a must-have if you’re an Ahrefs user
Ayima Page Insights : Quickly shows you on-page SEO page insights at a glance
MozBar : Provides instant metrics on any site or SERP
SEOquake : An all-in-one SEO toolkit in a browser extension
Linkclump : open, copy, or save multiple links at the same time
SimilarWeb ( Firefox version ): In-depth traffic and engagement stats for any website — right at your fingertips
NoFollow : Outlines nofollow links on webpages
Data Miner : Scrape data from websites quickly and save to a spreadsheet
WhatRuns : Tells you what’s under the hood of a website
Fat Rank : Tells you where your website ranks on Google.
OpenSEO Stats : Get a page’s traffic ranking, meta tags, load time and way, way more
NAPHunter : Searches for name, address and phone number info
Majestic Backlink Analyzer: Provides Majestic’s functionality within your browser
Colorzilla : Get hex and RGB values from websites using an eyedropper tool## The Best Google Chrome Add-Ons to Increase Productivity
Nimbus Screenshot & Screen Video Recorder : Fast, flexible screen capture and annotation
GMass : Send customized emails to multiple people at once within Gmail
LinkedIn Sales Navigator : Tells you a contact’s LinkedIn information within Gmail.
Page Analytics : Displays a quick Google Analytics view at the top of each page you visit
Calendly : Automates scheduling meetings inside your favorite email and calendar programs
MixMax : Track email opens, downloads and clicks, create templates, schedule meetings and much more
Hunter : Sniffs out email addresses on the web.
ObservePoint TagDebugger : Quickly troubleshoot analytics tags, on-click events, variables and more
Yesware : Tracks your outgoing email, allowing you to see who’s clicking your links
