[owebmaster]

1. if 90% of the people don't want a toolbar in a PWA (I'm being generous about 10% wanting it), it makes sense to not have it

2. It is not harder to implement a button to show the toolbar menu

In all case, it should be (it already is by the spec!) a developer option, not something enforced by the browser.

[Vinnl]

I have learned a long time ago not to make claims about how hard it is to implement something in other people's projects - I get it wrong often enough about my own.

(Also, I don't think there's a single "PWA spec".)

[bad_user]

Firefox's UI can be easily tweaked with CSS. It's trivial, for example, to get rid of all chrome. The real problem is their ideological stance against PWAs.

[trallnag]

It's definitely doable to make the bar disappear with a tiny bit of CSS. Did it myself in the past and the Firefox team does it partially for their vertical tabs feature