tabLock_mod2.uc.js blocks local saved mp4 files

[Endor8]

Dear Alice.
Please excuse me if i disturb you.
I have a small issue with the your script tabLock_mod2.uc.js
Tab is not protected or locked, but if you try to open a video File, mp4, by
pressing ctrl + o or with Menu - File and klick on a Videofile, nothing happens .
If I remove your script tabLock_mod2.uc.js it works fine.

Browser console says:
Uncaught TypeError: params is undefined
openTrustedLinkIn file:///C:/Users/XXXX/AppData/Roaming/Mozilla/Firefox/Profiles/96lk74ko.default/chrome/tabLock_mod2.uc.js:84
fpCallback_done chrome://browser/content/browser.js:2955
tabLock_mod2.uc.js:84:15

If you find the time, please take a look.
Thank you very much for help.
Kind regards
Endor

[Endor8]

Dear Alice.
Thank you very much for this fixed version.
Now it works perfect.
Wish you a nice weekend.
Kind regards
Endor