I found out today that the page for the IPA Furigana extension for Chrome has disappeared. I found the extension in my local folder and decided to upload it in case others find themselves in the same situation. You can [download](https://files.catbox.moe/s76y09.zip) it here.
To install, extract the `jnnbgnfnncobhklficfkdnclohaklifi` folder in `%localappdata%\Google\Chrome\User Data\Default\Extensions`.