Lightbeam seems to be triggered every few milliseconds, even when I have no content at all

[Yoric]

I'm currently investigating why Lightbeam triggers the Slow Add-on Alert in Firefox Nightly. For some reason, Lightbeam seems to be triggered every few milliseconds (or perhaps seconds, it's hard to tell with my heavily-instrumented Nightly), with the following stack:

0 ToolbarIconColor.inferFromText() ["chrome://browser/content/browser.js":18578]
    this = [object Object]
    this.init = [function]
    this.uninit = [function]
    this.handleEvent = [function]
    this.observe = [function]
    this.inferFromText = [function]
    this._initialized = true
1 ToolbarIconColor.handleEvent(event = [object Event]) ["chrome://browser/content/browser.js":18543]
    this = [object Object]
    this.init = [function]
    this.uninit = [function]
    this.handleEvent = [function]
    this.observe = [function]
    this.inferFromText = [function]
    this._initialized = true

[jonathanKingston]

We have since moved to: https://github.com/mozilla/lightbeam-we so no longer relevant.