A blank space is displayed instead of the "Voice Fill" toolbar button

[SoftVision-CarmenFat]

[Notes]:

• After clicking the blank space, the following error message is displayed in the browser console:

  TypeError: asm.js type error: Disabled by 'asmjs' runtime option  webrtc_vad.js
  unreachable code after return statement  bodymovin.js:2200:8

[Affected versions]:

• Firefox 56.0.2 and up
• Voice Fill v.1.3.2

[Affected Platforms]:

• All Windows
• All Linux
• All Mac

[Prerequisites]:

• Have a Firefox profile with the Voice Fill (v. 1.3.2) experiment installed.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites.
2. Observe the "Voice Fill" toolbar button.

[Expected result]:

• The "Voice Fill" toolbar button is correctly displayed.

[Actual result]:

• A blank space is displayed instead of the "Voice Fill" toolbar button.

[Additional Notes]:

• Attached a screen recording of the issue:

[andrenatal]

Fixed by https://github.com/mozilla/speaktome/commit/fa4c80fc0b4a367bfbc8db10315ee5ffafffbf83

[SoftVision-CarmenFat]

This issue is no longer reproducible on Voice Fill version 1.3.4.