I not sure if you get to migrate your project to Chrome or not. But whenever I need to do something like this e.g. changing the title of webpage when there is small update for website or changing hardcoded delay to dynamic (delay coming from dictionary) etc. I always use Notepad++ to modify the XAML files using regex or direct replace. There is option in Notepad++ to find and replace in multiple files.

Note: Always create backup of the project before using Notepad++ to modify the XAML files, just incase if something goes wrong.

Let me know if you need more clarification.