Build prod throw error on startup with Firefox ESR 45

I’m submitting a…

[x] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question

Current behavior

Angular 5 does not work on Firefox ESR version 45 (tested on 45.2.0 and 45.6.0) when the app is built in production mode (ng build -prod). But the following commands does work :

• ng serve
• ng serve --aot
• ng build
• ng build -prod --aot=false

The app works correctly with chrome, IE Edge or a recent version of Firefox (52, 54).

Expected behavior

Like with Angular 4, it should work when the app is built for production.

Minimal reproduction of the problem with instructions

• Create a new app
• Build the app for the ‘prod’ environnement
• The app works with

An easy way to reproduce the problem is to open https://angular.io/ with firefox ESR 45. The app does not start at all, and there is an error in the console: Error: `TypeError: this is undefined

t() main.9227b8376af048079879.bundle.js:1 t/<() main.9227b8376af048079879.bundle.js:1 t() main.9227b8376af048079879.bundle.js:1 .LMZF/q</t.prototype.get() main.9227b8376af048079879.bundle.js:1 Qt/</<() main.9227b8376af048079879.bundle.js:1 Qt/<() main.9227b8376af048079879.bundle.js:1 Qt/<() main.9227b8376af048079879.bundle.js:1 .cDNt() main.9227b8376af048079879.bundle.js:1 o() inline.421b80f0f331917cd5b3.bundle.js:1 0 main.9227b8376af048079879.bundle.js:1 o() inline.421b80f0f331917cd5b3.bundle.js:1 window.webpackJsonp() inline.421b80f0f331917cd5b3.bundle.js:1 <anonyme> main.9227b8376af048079879.bundle.js:1`

The app work when opening the previous version of angular.io (https://v4.angular.io/docs)

What is the motivation / use case for changing the behavior?

Some of our customers still use older versions of Firefox (in our context, Firefox ESR 45)

Environment

Angular version: 5.2.0


Browser:

- [x] Firefox version 45 (Firefox ESR)

 
For Tooling issues:
- Node version: 8.9.4  
- Platform:  Linux, Windows

Others:

[ahexdev1]

Javarthur, Hi, Did your problem got resolved.

I am also facing same issue.

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