438989 - Cmd drag doesn't duplicate tab on OS/X

Status: RESOLVED DUPLICATE of bug 410569

(Firefox :: Tabbed Browser, defect)

Description

[Ted Pavlic]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:1.9) Gecko/2008061004 Firefox/3.0
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:1.9) Gecko/2008061004 Firefox/3.0

IN FF3, tabs can now be duplicated by Cntrl+dragging the tab. Because Cntrl+click is the right-click equivalent on OS/X, Cmd+dragging was supposed to do the same thing on OS/X.

On my system (using RC2 and RC3), Cmd+dragging moves the tab (just like normal dragging). It appears like the Cmd isn't being caught.

Reproducible: Always

Steps to Reproduce:
1a. Hold Cmd, click the tab, drag it. 
OR
1b. Click the tab, drag it, press Cmd before releasing.
Actual Results:  
The tab is MOVED.

Expected Results:  
The tab should be COPIED.

Comment 1

[Steven Michaud [:smichaud] (Retired)]

I can confirm this, but don't understand why it's happening.

On Windows and Linux the "copy tab" key combination is "ctrl-drag".
And (of course) if you try "ctrl-drag" on the Mac, you get a context
menu.  Could it be that the relevant Gecko code hasn't (yet) been
properly customized for the Mac (i.e. that it expects "ctrl-drag"
instead of "cmd-drag")?

Josh, any ideas?

Comment 2

[Ted Pavlic]

Note that it is "Option", not "Cmd", that is the "drag copy" modifier in the Finder. 

I have verified that "Option" also doesn't work. It's probably better that Firefox uses Cmd for this feature as Cmd is the "Mac Control" for so many other features in Firefox.

That being said, BECAUSE "Option" is the analogous Finder modifier, maybe the code is TRYING to use Option. Otherwise, it seems like the code should do whatever it's doing for the other Windows-Cntrl traps.

(a possibly related note... Users of the "Vimperator" plugin are aware that it's impossible to get "Vimperator" to recognize (or use) Cmd in its key mappings. Maybe the Firefox limitation causing this tab bug is also masking Cmd from Vimperator)