For browsing help files, the Dash application is very useful on Mac and iOS.
For Windows you can use the Zeal application.
Here you can click to launch Dash and install our plugin help: MBS FileMaker Plugin
You can download the archives manually on our website for FileMaker.
For FileMaker you find the docsets for v15 and v16 here in several languages: FileMaker Dash Docsets
Feedback is welcome.