Sky Tree

Install firefox52(ESR)

Install firefox older than Quantum version.

Warning!

Firefox52 is old version. Update to latest for browsing other pages.

Disable verifying add-on

Open about:config

xpinstall.signatures.required to false

Disable auto-update

Disable auto-update in preferences.

Install Add-on

Open Add-on Manager. Install add-on from file. Choose Tilt.xpi.

Show 3D View

Open index.html with browser. Launch Tilt from Development Tools.