Is the link/button a window.open() that (re)uses a named window, such as

window.open('app.html', 'appwindow');

On the first use, with the default settings, Firefox needs to DIVERT the new window to a new tab instead. By default, Firefox gives that new tab focus.

On the second load, Firefox does NOT need to open either a new window or a new tab, it only needs to launch a page in the existing tab. So I don't think these two preferences apply to that process:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful or accepting the risk.

(2) In the search box above the list, type or paste inback and pause while the list is filtered

• browser.tabs.loadInBackground has a default value of true
• browser.tabs.loadDivertedInBackground has a default value of false

Changing that first one to false didn't affect this problem for me.

If you are the application developer and you want the page to get the focus, you could look at something like https://developer.mozilla.org/docs/Web/API/Window/focus to see whether that works for you.

See also: Where to go for developer support

did the chnage you suggested but it didn't resolve my issue

Yes, I said I tested that change and it didn't have any effect. So then I wrote:

jscher2000 said

If you are the application developer and you want the page to get the focus, you could look at something like https://developer.mozilla.org/docs/Web/API/Window/focus to see whether that works for you. See also: Where to go for developer support

Are you the application developer, or do you need an end-user hack-around for that site?

I am an application developer .Is there any solution ?

Please try the two links I provided before.

It didn't resolve my issue.

If you posted a question on Stack Overflow, could you provide a link to it here for reference. If you didn't post there yet, please see the link in this article: Where to go for developer support.