How to set Preferences such that new tabs open to same page as active when Command-T was hit?

Question

On opening a new tab, the tab by default opens to thumbnails based on recent history. A la Safari, I want the new tab to open *to same page as was active when Command-T was hit*. What are the specific steps to take, to set as the default (preference), new pages to open to "Same page"? ("Same page" is Safari's check box in its Preferences.)
Note, I have navigated available Mozilla Support, and using about:config have reset browser.newtab.url so that the new tab appears blank (discontinuing tracking of recent history for this purpose).
Note, more importantly, I have found this Support Forum article, which, though challengingly written, has given me a temporary solution:
* https://support.mozilla.org/en-US/questions/891635
(The temporary solution for the Mac OS is to Command-click on the "Reload current page" icon in the url/Address box in the browser toolbar, which opens a new tab in the same window.)
However, I would still like to set this as a permanent Preference, and would ask someone communicate a solution to me. Cheers, LeProf

Answer 1

''LeProf_7272 wrote:''
if I can possibly just create a new config line
You can't, which is why I suggested the above add-ons. There is no option in the UI or hidden preference in Firefox that can duplicate a tab whenever you open a new tab. ''browser.newtab.url'' can only be set to a fixed address, not whatever address happens to be open in the current tab.
The are only two built-in methods for duplicating a tab:
# Hold down the '''Option''' key and drag the tab to a new position on the tab bar.
# Hold down the '''Command''' key and click the Reload button in the address bar.
* [[Use mouse shortcuts to perform common tasks in Firefox]]
You can make feature requests by filing enhancement bug reports, or by opening the Help menu and clicking Submit Feedback.
* https://developer.mozilla.org/docs/Mozilla/QA/Bug_writing_guidelines
* https://input.mozilla.org