Different "Apple + LeftArrow" keyboard shortcut behavior in Firefox on Mac OS X

[Mike]

OS: Mac OS X 10.6.1

Browser: Firefox 3.5.3

Product: CKEditor 3.0

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Steps to reproduce:

1) Open "​http://ckeditor.com/" in Firefox on Mac OS X

2) Click on [See the demo] button

3) Place text cursor anywhere in CKeditor enabled textarea and type there a random word

4) Press "Apple + LeftArrow" keyboard button combo:

Expected: Text cursor moves to beginning of line, like in any other textarea.

Actual: Browser recognize this button combo as "Browser back" shortcut, and returns to "​http://ckeditor.com/"

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In Safari 4.0.3 - behavior is correct: when text cursor is inside CKeditor textarea, button combo moves cursor to beginning of line, when textarea is not selected - browser recognizes this shortcut as "Go back" button.

[Mike]

Also same thing on nightly build.

[Jakub Ś]

This issue is reproducible in all versions of Firefox (3.6, 4, 5) from CKEditor 3.0.

1. Open any sample
2. Place the cursor at the beginning of sample text
3. Press Apple+right arrow (or windows+right arrow). The cursor goes to the end of sample text
4. Press Apple+left arrow (or windows+left arrow). The browser goes back one page.