A bookmarklet to remove autoCloseTags on existing VF editors and all plugins on new VF editos.

DisableAutoCloseOnVFEditors

javascript:

console.log('Disabling auto close tags on all existing vf editors');
Ext.getCmp('editors').items.each(function(editor) {
    if (editor instanceof apex.editor.VisualforceEditor && editor.cmEditor) {
        editor.cmEditor.codeEditor.setOption('autoCloseTags', false);
        console.log('Removed autoclose on editor ' + editor.id);
    }
});


console.log('Disable all plugins on new vf editos');
apex.editor.VisualforceEditor.prototype.getAddons = function() { return {}; };