After a few weeks in the arms of Firefox 3 betas, I’ve returned to Safari as my daily browser. Unsurprisingly, it’s the interface that drove me back.

But I’m not talking about cosmetic issues — or at least not only about cosmetic issues. The new default theme for Firefox theme looks pretty good, especially when you switch the toolbar icons to the small size. The Safari-style “GrApple” Firefox themes I linked to last month makes Firefox 3 look even better, albeit mostly by mimicking Safari.

But cosmetic appeal is just the surface. Steve Jobs, in a 2003 New York Times magazine interview, said:

“Most people make the mistake of thinking design is what it looks like. People think it’s this veneer — that the designers are handed this box and told, ‘Make it look good!’ That’s not what we think design is. It’s not just what it looks like and feels like. Design is how it works.”

And that’s just it. Firefox 3’s shortcomings as a Mac app are behavioral, too. The main issues that drove me back to Safari:

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Background Window Appearance — Starting with Leopard, standard application windows follow a simple, consistent rule: the frontmost window of the current application gets a medium gray color while all other windows have a lighter, flatter look. The idea is that with several windows visible at once, giving the active one a darker look makes it easier to pick out visually. (One of the long-standing gripes regarding the late brushed metal theme — Christ, remember that ugly thing? — was that its windows barely changed appearance when switching from active to inactive.)

Firefox 3 doesn’t do this. Its windows all have the darker “active” look even when in the background. And I believe that its theming mechanism does not allow for it.
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Text Editing Shortcuts — Firefox 3 still doesn’t support certain standard Mac text editing key bindings. For example, in a one-line text field, the Up and Down Arrow keys should move the insertion point to the beginning and end of the line, respectively. Drives me nuts.
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Dictionary — Firefox doesn’t support the system-wide dictionary. In Safari (and most other apps), you can hover the mouse over any word and use Command-Control-D (by default) to display the definition of that word right there in the current window.
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Services — Firefox doesn’t support the Services menu. Safari does, and I use this all the time for invoking text filters I’ve made using ThisService, and for sending the current text selection to LaunchBar as input.
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Tabs — Firefox 3 does let you drag to reorder tabs within a window, and drag tabs between windows, but it doesn’t let you drag a tab out of a window to create a new window with just that tab. Safari 3 does. Picky-picky, I know, but I use this feature in Safari every day to group related tabs together in their own window.
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Location Field — The new Firefox 3 location field, the so-called “AwesomeBar”, is too clever. When I click the mouse in the middle of a URL, I just want to place the insertion point. I don’t want to select the entire URL. If I wanted to select the entire URL, I’d double-click. Click to place, double-click to select — just like any other text field.

Auto-completion in Firefox requires the use of the Down Arrow key to select something from the list of suggestions. In Safari you can just use Return to accept the first suggestion. It might just be habit, but it feels to me like Safari’s auto-completion works a little better. Also, in Firefox, during auto-completion, the Tab key acts like Down Arrow — it selects the next suggestion in the auto-completion list. In Safari Tab moves the focus to the Search field, as it should.

In Firefox’s favor, its new location field does some very cool things that Safari’s doesn’t. For example, when matching what you’ve typed against the URLs in your bookmarks and history, it looks anywhere within the URLs, not just at the beginning as Safari does. This means you can type “foo” to match the URL “example.com/foo/”. You can’t do that in Safari.
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History — I like Safari’s hierarchical History menu. What Safari does is list the 20 most recently loaded URLs, followed by sub-menus for each of the last seven days. Firefox only lists the 10 most recent URLs in the History menu. You can get more done right from the menu in Safari, whereas in Firefox you’ve got to open the History window.
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Page Load Progress Indicator — Every time I dally with another browser, I immediately miss Safari’s in-location-field progress meter. Back in January 2003 when Apple released the first public beta of Safari 1.0, I described this feature as follows:1

Hideous. It looks like partially-selected text. Please scrap it.

Over time, the feature has not just grown on me, but I’ve come to appreciate the cleverness of its design. I was wrong, and whoever designed this for Safari was right. The truth is that page loading is the slowest and most unpleasant aspect of using a web browser. It’s important to know whether a page has finished loading yet, and so a browser’s progress indicator deserves a prominent spot. The best spot is near the location field, because that tends to be where your eyes are when a page starts loading. You can’t get any closer to the location field than being inside the location field itself. But, once a page has loaded, there’s no reason for a progress indicator to remain on screen.

Firefox 3 has a small spinning progress indicator in the toolbar. It’s too subtle, and as a simple spinner, offers no indication as to how far along the page load has progress, only that it is still loading. Firefox does offer a proper progress bar in the status bar footer, but (a) it’s far, rather than close, to the location field in the toolbar; and (b) the status bar is optional — if you turn it off, the only progress indicator is the spinner.

This one’s a total win for Safari.
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New Tab Shortcut — In Safari, Command-T always creates a new tab, even if a browser window isn’t frontmost; it does the Right Thing and creates a new tab in the frontmost browser window and brings that window forward. In Firefox, invoking Command-T just beeps if, say, the Downloads window is frontmost, or if there is no open browser window.
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Inline PDF Viewing — An obvious win for Safari.
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AppleScript Support — Firefox 3 has almost none. Safari’s is pretty good.