Ah, yeah, you're correct. Firefox had changed the permissions for this some time ago. You can optionally toggle the browser.tabs.loadDivertedInBackground value

Ah, yeah, you're correct. Firefox had changed the permissions for this some time ago. You can optionally toggle the browser.tabs.loadDivertedInBackground value in about:config to true, then the v shortcut will open in background. That said, I find the add-on a must-have. I'm always using it to save web pages. Do not forget to check the HTTPS option in setting, though. As a reference [1]: browser.tabs.loadInBackground => when you open a regular link in a new tab using Ctrl+click (or right-click > Open in a New Tab) default = true, do not make the new tab active In the Options dialog/page, this is controlled by the "When I open a link in a new tab, switch to it immediately" setting. browser.tabs.loadDivertedInBackground => when you divert a script-generated new window to a new tab using Ctrl+click, or when a page uses the target attribute to launch a link in a new window and you divert it to a new tab default = false, make the new tab active browser.tabs.loadBookmarksInBackground => when you load a bookmark in a new tab using Ctrl+click (or right-click > Open in a New Tab) default = false, make the new tab active [1] https://support.mozilla.org/en-US/questions/1066419 https://support.mozilla.org/en-US/questions/1066419