Update (): An earlier version of this article incorrectly stated that OpenZFS and ZFS supported reflink internally, but didn’t expose any syscalls for it. These file systems do not support reflinks. Thanks to Richard Yao of the OpenZFS project for the correction.
Update (): Added the new XDG_STATE_HOME directory as introduced in the XDG Base Directory Specification version 0.8.
Update (): Updated with a statement from TeamViewer. The company has decided to remove the font in a future release.
Update (): The Font Enumeration API, newly added to Chromium browsers (like Google Chrome and Microsoft Edge) has reintroduced font fingerprinting. However, the new API requires a per-domain permission prompt, so it’s not as leaky as the old Flash Player based method.
Update (): Added details for detecting the new Firefox Translations (Bergamot) extension.
Update (): I just learned that WebPositive, the web browser in Haiku OS, stopped announcing support for Deflate in August 2014. It’ll still attempt to decode Deflate responses, however. It’s the first (and only) web browser to drop Deflate.
Article updated at .
Update (): Bing today published a blog post announcing the deprecation of the bing.com/ping API. The announcement says it’s deprecated “starting today”. However, readers of my blog will know it stopped working five months ago.
preconnectUpdate (): If you’re using the newer Google AdSense script where the script element include an crossorigin="anonymous" attribute, then you need to duplicate all the link elements above with a matching attribute. (The current version of Google’s script relies on both anonymous and regular connections.) Check y…
<link rel=dns-prefetch> and when to use preconnectUpdate (): Quick update to say that nothing has changed! Neither Firefox version 100 nor Safari version 15.4 has addressed any of the issues discussed in this article.
Update (): SSLPing ceased operations in April 2022 after getting crushed by its own technical debt. Read the statement from Chris Hartwig. Most people looking for a free certificate monitoring service are probably already using free certificates from Let’s Encrypt; who’ve automated certificate renewals and se…
Update (): The issue described below was fixed in Safari 15 (released in September 2021). This version is only available on iOS version 15 and newer, and MacOS version 12 and newer.