Waterfox: Checkboxes in some addons are not displayed

[hubitor]

Describe the bug
I've installed some addons such as "Tab Wrangler" and "Auto Tab Discard" and noticed that the checkboxes in their preferences are not displayed.

To Reproduce

1. Install addon "Tab Wrangler" or "Auto Tab Discard"
2. Go to Preferences

Expected behavior
Display checkboxes

Desktop (please complete the following information):

• OS: Arch Linux
• Version 56.2.8

[laniakea64]

What version of GTK 3 do you have?
What GTK theme are you using?

[hubitor]

I'm using KDE Plasma 5.15.3 with Breeze Dark theme.

[laniakea64]

FWIW, I do see those checkboxes with Breeze-Dark GTK theme on Xubuntu 18.04.

Again, what version of GTK 3 do you have?

[hubitor]

This package is installed:
gtk3 1:3.24.7+11+g3a959e984f-1

[laniakea64]

I tested official Waterfox 56.2.8 in Antergos + KDE + Breeze-Dark theme (set as desktop theme and as GTK 2/3 theme). The checkboxes are visible there too.

The GTK 3 version I got in Antergos is 1:3.24.7+25+g17665f06e3-1. Since Antergos directly uses Arch Linux repos, can you check if that update is available to you?

[hubitor]

Thanks for checking!

The package:
gtk3 1:3.24.7+25+g17665f06e3-1 is available and I've just installed it. I've rebooted and checked again. The problem persists.
I've checked other installed addons and this the result:

Affected addons:

• HTTPS Everywhere
• NoScript
• Restart
• Snap Links
• Tab Mix Plus
• Export Tabs URLs
• Tree Style Tab
• Session Manager

Not Affected addons:

• Adblock Plus

As example, this is how Tree Style Tab normally looks like:
http://johnbokma.com/mexit/2011/07/22/tree-style-tab-1-appearance.png

and in my case:

check boxes and radio boxes are not visible anymore. I know for sure that e.g. Tab Mix Plus was working fine before but I have no idea what has changed.

[laniakea64]

check boxes and radio boxes are not visible anymore.

Nor is the entire Breeze-Dark theme! Your Tree Style Tab options is supposed to look like this -

Check your settings in System Settings > Application Style > GNOME/GTK Application Style

[hubitor]

@laniakea64: Many thanks!
check boxes are back...
The selected GTK2 and GTK3 themes were Breeze and not Breeze Dark. Somehow the settings were changed.