Meteor error on reloading

Every time I run my meteor application in Firefox, I see the following two errors in the Firefox debug console:

  • mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create meteor.js:526:6

  • Error: meteor.js:525:14

Nothing is apparently wrong with my application, I just can’t seem to track down what’s causing these errors. I’ve tried setting a breakpoint in the script debugger in error.js where it appears to be getting caught but it’s not getting hit. I don’t see meteor.js in the script debugging as a source that was loaded in order to set a breakpoint.

Has anyone else run into this?

I have the same error.

mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create

but now it is on meteor.js:526:7

My Meteor version is 1.2.0.2 and Firefox version is 41.0.1.