Hi buissonthomas, can you check the following setting: (1) In a new tab, type or paste '''about:config''' in the address bar and press Enter/Return. Click the button accepting the risk. (2) In the search box in the page, type or paste '''neww''' and pause while the list is filtered (3) Review/Adjust the preferences as follows: '''''For external links, focus especially on (C):''''' (A) '''browser&#46;link&#46;open_newwindow''' - ''for links in Firefox tabs'' This is the one that has a checkbox on the Preferences page: * '''3 = divert new window to a new tab (default)''' * 2 = allow link to open a new window * 1 = force new window into same tab (B) '''browse&#46;link&#46;open_newwindow&#46;restriction''' - ''for links in Firefox tabs'' By default, if a page sets width, height, or toolbars for a popup, Firefox will let it be a separate window. To force those into a tab as well, you can change this preference to 0: * 0 = apply the setting under (A) to ALL new windows (even script windows with features) * 2 = apply the setting under (A) to normal windows, but NOT to script windows with features (default) * 1 = override the setting under (A) and always use new windows (C) '''browser&#46;link&#46;open_newwindow&#46;override&#46;external''' - ''for links in other programs'' * -1 = apply the setting under (A) to external links (default) * 3 = open external links in a new tab in the last active window '''<== try this''' * 2 = open external links in a new window * 1 = open external links in the last active tab replacing the current page '''<== make sure you do not have this setting''' To return to normal if things go haywire, there's an arrow-like reset button at the right end of each of those rows if it has a non-default value. Success?

Thanks a lot, it works ! Have a nice week.