The best alternatives to TimeFunction are Twitter, WikiBot, and Six Degrees of Wikipedia. If these 3 options don't work for you, we've listed a few more alternatives below.
Qikipedia is a free and open source browser extension for Chrome. It allows you to highlight text from any website, and shows you a summary of the corresponding Wikipedia article, if one exists. Features: - Get instant Wikipedia summaries from any website - Highlight up to 7 words - Dark theme available - Multiple languages supported
This extension checks Reddit or Hacker News, to see if the current page is listed on their site (see video). If there is a post on one of these sites, there will be a button added to the bottom corner of the screen. Hope it's as useful to you as it is to me!