Always enjoyed being able to open new windows in a tab. However, after upgrading found I was no longer able to do this.

Question

Have search all over web and tried every solution I could find; explored addons, restored, even reinstalled 19.0 but I am still unable!
It is very frustrating.
Would appreciate suggestions (never thought I'd say this but Safari is looking good!).
Thank you.

Answer 1

Let me see if I understand the original problem. You can checked the preference on the following tab to divert new windows to tabs instead:
Firefox menu > Preferences > Tabs
And that was not working correctly, either on all sites or a few particular sites.
Note that by default, sites that open a new window with particular specifications, such as the size, bypass that setting. To force even those windows into a new tab, you can use the about:config preference editor.
In a new tab, type or paste '''about:config''' and press Enter. Click the button promising to be careful.
In the filter box, type or paste '''link.o''' and pause while the list is filtered.
Double click these and set the value as desired:
'''(A) browser.link.open_newwindow'''
'''3 = divert new window to a new tab''' (<u>default</u>) (checked*)<br>
2 = allow link to open a new window (unchecked*)<br>
1 = force new window into same tab
'''*''' First checkbox in Options > Tabs
'''(B) browser.link.open_newwindow.restriction''' - for links in Firefox tabs
'''0 = apply the setting under (A) to ALL new windows (even script windows)<br>
2 = apply the setting under (A) to normal windows, but NOT to script windows with features (<u>default</u>)<br>
1 = override the setting under (A) and always use new windows
'''(C) browser.link.open_newwindow.override.external''' - for links in other programs
-1 = apply the setting under (A) to external links (<u>default</u>)<br>
'''3 = open external links in a new tab in the last active window'''<br>
2 = open external links in a new window<br>
1 = open external links in the last active tab replacing the current page
Sorry, that's a lot of data, but hopefully it's reasonably clear.