File icon moves to middle of file tab when you provide key input to code editor in Firefox

[JPinkney]

The file icon moves to the middle of the file tab when you provide key input to the code editor in Firefox. This does not happen in Chrome.

Reproduction Steps:
In Firefox create a new project inside a workspace. Then go to the main file and provide key input. The file icon on the tab then moves to the middle with each key press.

OS and version:
Firefox: 53.0.3
OS: Fedora 25 (4.11.3-202.fc25.x86_64)
Using Eclipse Che nightly

Diagnostics:

CLI:
TTY: false
Daemon: /var/run/docker.sock
Image: eclipse/che:nightly
Version: nightly
Command: info
Parameters: info
Mounts:
/data: /home/jpinkney/Documents
/data/instance: not set
/data/backup: not set
/repo: not set
/assembly: not set
/sync: not set
/unison: not set
/chedir: not set
System:
Docker: native
Proxy: not set
Internal:
CHE_VERSION: nightly
CHE_HOST: 10.15.17.57
CHE_INSTANCE: /home/jpinkney/Documents/instance
CHE_CONFIG: /home/jpinkney/Documents
CHE_BACKUP: /home/jpinkney/Documents/backup
CHE_REGISTRY: /version
CHE_DEBUG: false
IP Detection: 10.15.17.57
Initialized: true
Image Registry:
IMAGE_INIT=eclipse/che-init:nightly
IMAGE_CHE=eclipse/che-server:nightly
IMAGE_COMPOSE=docker/compose:1.8.1
IMAGE_TRAEFIK=traefik:v1.3.0-rc3
BOOTSTRAP_IMAGE_ALPINE=alpine:3.4
BOOTSTRAP_IMAGE_CHEIP=eclipse/che-ip:nightly
UTILITY_IMAGE_CHEACTION=eclipse/che-action:nightly
UTILITY_IMAGE_CHEDIR=eclipse/che-dir:nightly
UTILITY_IMAGE_CHETEST=eclipse/che-test:nightly
UTILITY_IMAGE_CHEMOUNT=eclipse/che-mount:nightly
che.env:
CHE_HOST=10.15.17.57
CHE_SINGLE_PORT=false