Window class on Linux makes it impossible to use docks/launchers

[Slater91]

After the 2020.01 update, both Waterfox Classic and Waterfox Current identify themselves as "waterfox", so window class-based detection methods (e.g. the one used by Latte Dock) fail.

To Reproduce

1. Open Waterfox Current and Waterfox Classic on KDE Plasma
2. Both are identified and treated as Waterfox Classic on Latte Dock
3. Right-click on the titlebar and select "configure special application settings"
4. Both Classic and Current are identified as "waterfox"

Expected behavior
The two browsers should identify themselves correctly as "waterfox current" and "waterfox classic" as they did in the previous version.

My configuration

• OS: Linux - KDE neon
• Version: Classic + Current 2020.01

[Slater91]

Note: it seems like something has changed between the 2019.12 version and the 2020.01 version. By setting "StartupWMClass=WaterfoxClassic" in the .desktop file, the issue goes away. This was not necessary in the previous version, so it seems like some change was made that impacts the ability of WMs to correctly identify the windows.