Gyllenhaalin' it is a free Chrome browser extension developed by JEF Diaz. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This extension adds a touch of fun and entertainment to your browsing experience.

With Gyllenhaalin' it, you can replace the term "Neanderthal" with the name "Jake Gyllenhaal" throughout web pages. This feature adds a humorous twist to your internet reading and brings a smile to your face. Additionally, the extension also supports the variant UK spelling of "Neanderthal" as "Neandertal" with the name "Gyllenhall".

For fans of Jake Gyllenhaal, Gyllenhaalin' it goes a step further by offering an option to replace all images on web pages with images of Jake himself. This feature allows Gyllemaniacs to indulge in their admiration for the talented actor while browsing the internet.

Overall, Gyllenhaalin' it is a lighthearted and enjoyable browser extension that adds a touch of humor and entertainment to your online experience. Whether you're a fan of Jake Gyllenhaal or simply looking to spice up your browsing, this extension is sure to bring a smile to your face.