Huh? Happy Tree Style Tabs user here, and another addon (Sidebery) seems to be growing in popularity as well. You can disable the built-in tabs with userChrome.css. What am I missing?

How do you disable the top tabs these days?

I activated browser debugging, pressed ctrl + alt + shift + i and then hunted down the offending tab bar and put in "display: none" for it.

It gets harder and harder year by year though and on the tabstrip issue in Bugzilla there's at least one person who was annoyed and told me to not question peoples motives after I asked a simple question about it.

Anyone here working for Mozilla, I ask the same question here: are you overcomplicating it? I managed to get rid of that tab bar using a CSS hack, why can't we just get a function to apply that css, at least in developer edition?

The CSS "hack" is the official way. That's sort of the point of using CSS to display the UI. It's editable.

Pretty sure the point of using the rendering engine to display the UI was to make it easier to write cross-platform UI; granted, though, the point of then having the feature to use CSS to modify the UI was to do that (and it was relatively easy once the UI was already written in the rendering engine).

I actually had changed some about:newtab styles. They even outlived one or two updates after that, until full reset.

Except I don't think it is even documented anymore?

If you're happy with the current tree style tabs, I'll wager you never used the original. The current one is a bad rip off, with 90% of the actual features missing.

None of that matters to most people. People want a robust, fast, and secure browser that evolves rather than tries to be revolutionary. I think the large GUI changes did bug a lot of people.