TypeError: get(...).calendar is not a function

[erikvold]

TypeError: get(...).calendar is not a function Stack trace: anonymous@chrome://about-history/content/js/underscore-min.js line 5 > Function:6:1 j.template/c@chrome://about-history/content/js/underscore-min.js:5:13669 render@chrome://about-history/content/js/history.js:79:5 initialize/<@chrome://about-history/content/js/history.js:75:34 f@chrome://about-history/content/js/backbone-min.js:1:2220 e.Events.trigger@chrome://about-history/content/js/backbone-min.js:1:1452 .set@chrome://about-history/content/js/backbone-min.js:1:4030 initialize/<@chrome://about-history/content/js/history.js:364:11 unsafeWindow.addon.on/<@resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///Users/erik_vold/Library/Application%20Support/Firefox/Profiles/qejqb3wi.about-history/extensions/about-history@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/loader/sandbox.js -> resource://about-history-at-jetpack/about-history/data/history-pagemod.js:9:7 onEvent@resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///Users/erik_vold/Library/Application%20Support/Firefox/Profiles/qejqb3wi.about-history/extensions/about-history@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/loader/sandbox.js -> resource://gre/modules/commonjs/sdk/content/content-worker.js:45:9 onEvent@resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///Users/erik_vold/Library/Application%20Support/Firefox/Profiles/qejqb3wi.about-history/extensions/about-history@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/loader/sandbox.js -> resource://gre/modules/commonjs/sdk/content/content-worker.js:45:9 onChromeEvent@resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///Users/erik_vold/Library/Application%20Support/Firefox/Profiles/qejqb3wi.about-history/extensions/about-history@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/loader/sandbox.js -> resource://gre/modules/commonjs/sdk/content/content-worker.js:97:9 emitToContent@resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///Users/erik_vold/Library/Application%20Support/Firefox/Profiles/qejqb3wi.about-history/extensions/about-history@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/content/sandbox.js:377:3 emit/<@resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///Users/erik_vold/Library/Application%20Support/Firefox/Profiles/qejqb3wi.about-history/extensions/about-history@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/content/sandbox.js:66:49 delay/<@resource://gre/modules/addons/XPIProvider.jsm -> jar:file:///Users/erik_vold/Library/Application%20Support/Firefox/Profiles/qejqb3wi.about-history/extensions/about-history@jetpack.xpi!/bootstrap.js -> resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/lang/functional/concurrent.js:38:20 notify@resource://gre/modules/commonjs/toolkit/loader.js -> resource://gre/modules/commonjs/sdk/timers.js:40:9 timers.js