The setting in Tools > Options > Tabs: "New pages should be opened in": "a new tab/window" is for links that specify a target window for opening a link. The browser.link.open_newwindow pref only affects links that specify a target window. You can use the browser.link.open_newwindow pref to divert links that specify a target to the current tab or a new tab. The browser.link.open_newwindow.restriction pref allows to divert (onclick) JavaScript window.open() links. Links that do not specify a target always open in the current tab unless you override that with a middle-click or Ctrl (Mac: Cmd) left-click (new tab) or Shift left-click (new window).

There are also extensions that have options how a link is opened, so you can check out the Add-ons website.

Menu> Option> General> Tabs item 1 checked - Open new windows in a new tab instead

- doesn't seem to work for me :o ??

As I wrote above, that Tabs setting only applies to links that have a target window specified. You can right-click the link and check the code in the Inspector.

• https://developer.mozilla.org/Tools/Page_Inspector

If there is an 'ev' button appended then this means that JavaScript events are tied to the link.

I'm a 2 month newbie to Firefox and loving it, but my mouse died while on holiday so exploring into corners of my keyboard never seen before :o

Thanks for the assistance, much appreciated.

Retired & still learning everyday :-))