Francesco Polizzi
3 min readSep 8, 2016

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SiteSonar is a browser extension aimed at putting an end to bad ads through crowd-sourcing performance of advertisements on the web

SiteSonar displaying ad performance on cnn.com.

The SiteSonar browser extension (Firefox/ Chrome) is at the center of our mission to empower creators on the web. Through automatically monitoring ad performance as users browse, it empowers users by shedding light on how ads affect their everyday browsing. Through crowd-sourcing that performance data for display on our public dashboard, it serves an important role in empowering developers to make educated decisions when choosing an ad network.

Additionally, the performance tool allows users to profile specific sites for ad performance. You can use this to profile your favorite sites, or if you are a developer, sites that you maintain yourself. Asa and I both used this to profile our personal websites with some surprising results. Check it out to make sure you’re not asleep at the wheel as a content creator!

Interested in doing your own data analysis on the benchmarks that SiteSonar creates? We’ve got an export tool that allows you to do just that. All data you collect is available via the export tool in JSON format.

Lastly, SiteSonar collects a subset (roughly 10%) of your browsing data to do its job unless you choose to opt-out (check “settings”). We believe that the Open Web should mean equal access; something that can be attained through crowd-sourced data to empower content creators. As such, we care about your privacy and will never attempt to personally identify you. Check out our privacy policy and the data we collect for more information.

The SiteSonar dashboard is a tool for creators to view the crowd-sourced data that we collect. Aggregating benchmarks by ad network, anyone can view a breakdown of the average TTFB and File Size per ad. Additionally, users can drill down into ad networks to view the most common type of asset each ad network loads, along with the number of ads we’ve benchmarked for the network, and the distribution for each benchmark.

When browsing on slow and metered connections, we realize that every byte and millisecond matters. For that reason, we also aggregate ad benchmarks by individual website in order to give users the ability to make conscious choices for where to browse.

By crowd-sourcing ad performance from users like you, we hope to give power back to creators, and put an end to bad ads once and for all. Join us:

Download for Firefox or for Chrome.

& view the crowd-sourced data we’ve collected at site-sonar.com/dashboard.

Thanks from the SiteSonar Team: Francesco, Asa, and Purush. This project wouldn’t have been possible without substantive additions from awesome people like Justin, Luke, and Harald.

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Francesco Polizzi

Leading Product Management at Photomath. Prev Dropbox, Mozilla