I have been able to change the Quest links to open in the default external browser, Perhaps you could add it as an optional download for the Quest Journal.
For this I changed the code in "eq2ui_journals_quest.xml", line 71. Could be changed in other places too.
Code:
<Button Location="2,50" MaximumSize="60,26" MinimumSize="60,26" Name="URL2" OnPress="Url=("http://u.eq2wire.com/q/")##(Parent.Parent.Parent.QuestDetails.Name.Text)
browserexternal Url" ScrollExtent="60,26" Size="60,26" Style="/CommonElements.SmallPushButton.data.style" Visible="false">EQ2U</Button>
Command is "browserexternal"
-Alarra