Can I change the default tab position in Mozilla Firefox?

@terrence 

Yes, you can change the default tab position in Mozilla Firefox.

1. Open Mozilla Firefox and type "about:config" in the address bar.
2. You may receive a warning message, click on "I accept the risk!" to proceed.
3. In the search bar, type "browser.tabs.insertRelatedAfterCurrent".
4. Double-click on the preference to change its value. By default, it is set to "true" which means new tabs will open next to the current active tab.
5. To change the default tab position to the end of the tab bar, change the value to "false" by double-clicking on it.
6. Close the "about:config" tab and the changes will take effect immediately.

Now, when you open a new tab, it will open at the end of the tab bar rather than next to the current active tab.