You can go and open a second tab, change a few things go back and then reload the page to have its FTAN refresh. If you try this whith more than 2 tabs you have to keep track of the last one you refreshed . Try to explain that to your Client
For me the atempt to install that news thingy simply lead to a bunch of error messages and nothing else.
I dont think its a good idea to put something like that even into AMASP.
Open a module thread , let pepole test it , fix all Problems , put it on AMASP.
And then after a while its ok to discuss about adding it to the Core .
I dont even expect the patch go into the core as it is. If Devs ever decide to add this patch , it needs a complete rework as its mixed coding style and some redundant functions .