Tabs Numbering by andreczw

Firefox add-on that numbers each tab in order to facilitate tab-switching to users who use keyboard shortcuts. Thought for i3 file manager users.
Safe to use, no malicious code.
You can also check the code out youself on my github repository: https://github.com/siizx/firefox_tabsnumbering
- Remember:
In Firefox, the keyboard shortcuts Alt + 1 through Alt + 8 allow you to switch to the corresponding tab from left to right. Alt + 9 will switch to the last tab, regardless of how many tabs are open.
There’s no built-in keyboard shortcut to directly switch to tabs numbered 10 and above. If you need to navigate through a large number of tabs, you can use the following shortcuts:

Ctrl + Tab: This will switch to the next tab.
Ctrl + Shift + Tab: This will switch to the previous tab.