Tab font/fontsize changed to too small when updated to FFOX 64.0

[Ironizer]

Add-on version: 0.12.0
Firefox version: 64.0
OS + OS-Version: Win7 SP1

I just updated FFOX to 64.0 from 63.x, and the font and/or size of the font changed on the tabs, especially on the inactive tabs, the text became very small.

[Croydon]

I'm not sure why there should be a font size difference between FF 63 and 64 and I also can't reproduce it on Windows 10. Highly speculative: Maybe FF did change some styling which effects your configuration and not mine.

However, in it's core your want bigger font sizes so I'm going to close this as a duplicate of #195.
0.13.0 will bring bigger font sizes and some future update will make the font sizes configurable.