https://addons.mozilla.org/en-US/firefox/addon/new-tab-override/

aaronfranke said

See https://support.mozilla.org/en-US/questions/1013039?fpa=1 The "browser.newtab.url" property in "about:config" mentioned in the answers does not appear to exist for me on Firefox Quantum 64.0 64-bit.

Hello aaronfranke,

That preference was removed for security reasons - please see this bug report :

https://bugzilla.mozilla.org/show_bug.cgi?id=1118285

The extension that Franz_von_Suppe suggested will do what you want .....

McCoy said

That preference was removed for security reasons - please see this bug report : https://bugzilla.mozilla.org/show_bug.cgi?id=1118285

Thank you both, but can I just say, that was a stupid decision on Mozilla's part. Clearly this feature is very much desired since that extension has hundreds upon hundreds of 5-star reviews. Why should I download an entire browser extension to do what a 20 byte string could previously do?

aaronfranke said

Thank you both, but can I just say, that was a stupid decision on Mozilla's part.

As I said :   that preference was removed for security reasons - hackers abused it. So it was in fact a very wise decision - had the users' best interest at heart ......

Sigh. Please re-enable this. Now I have to use a different browser as these "new tab" addons are not signed.