by Ben Ubois
I want Feedbin to be the opposite of Big Social. I think people should have the right not to be tracked on the Internet and Feedbin can help facilitate that.
Since Feedbin is 100% funded by paying customers, I can focus solely on making the best product possible without compromises. Therefore, Feedbin can be private by default.
To me this means eliminating all potential points of leaking user data while using Feedbin.
Since Feedbin displays web content, this isn’t the easiest thing to do. Here are the leaks I’ve identified and eliminated.
The biggest visual and functional change is how iFrames work.
Feedbin previously whitelisted a number of iFrame sources like YouTube and Vimeo so you could see embedded content. iFrames embed full web-pages from a 3rd-party source. They’re usually resource intensive to load and they enable cross-site tracking.
Feedbin now replaces all iFrames with a custom new module. The new module still includes the poster frame from videos (where available) and will fetch the title and other metadata.
Clicking on the module will swap in the original iFrame. For YouTube and Vimeo, clicking will also start playing the video.
I prefer the look of this module to the original iFrame. It loads faster, has a clearer, consistent look with richer meta-data, and uses fewer resources doing it.
Google Analytics is probably the number-one tracker. It’s ubiquitous on the web. For a long time it was a no-brainer to install on any website because you get a lot of functionality for free.
Feedbin used Google Analytics up until April, 2018. It was useful to see some of the stats it provided. The browser stats were good to get a sense of when it would be appropriate to drop support for older browsers. It was also useful to see referrer information to see where customers were coming from.
I thought about replacing Google Analytics with Matomo, but I came to the same conclusion that it didn’t provide anything I need in order to run Feedbin. Better to not collect that data at all.
However there is an alternative. Both Twitter and Instagram offer public oEmbed endpoints. oEmbed can give you much of the data needed to properly render this content. Feedbin takes this a step further by making the oEmbed requests from the server. If your browser made the requests client-side, this would give the publishers the opportunity to read and set tracking cookies. The end result is that you see pretty much the same content as you did before.
<script> tags. Feedbin has always used an HTML sanitizer to strip dangerous content out of posts, including scripts, since that would be the definition of an XSS vulnerability.
Images are another potential source of leaking data. Feedbin has used an image proxy since launch to prevent mixed content warnings. A side benefit of the image proxy, is that your browser only makes requests to the proxy and the proxy gets the image data, preventing your request from reaching the origin.
Feedbin has the option to use fonts from Hoefler & Co.. This requires a single request to their service, which means that they have the opportunity to track you if they wish. To eliminate this source, the default article font is now a system font. Custom fonts will only be loaded if they’re chosen.
I think with these changes in place, the only external requests that should ever be made by your browser, with the exception of Stripe, are ones initiated by you.