Thread:Extension talk:VisualEditor/VisualEditor freezes at loading bar./reply (5)

Most of these lines are irrelevant (they relate to computation of styles). You can mute the "CSS" button (and others that aren't JavaScript) in Firefox to get a better picture.

One problem that stands out is this one: Error: JavaScript parse error: Parse error: Missing ; before statement in file 'MediaWiki:Common.js' on line 5 load.php5:1

Looks like you have some third-party scripts in the "" resource page on your local wiki with a syntax error in it. I suggest editing that page and removing its contents. Then try VisualEditor again. This should help identify it (or rule it out) as the source of the problem.