Hi, you want all tabs to open in the background? From what you say I assume you've already deselected 'When you open a link in a new tab, switch to it immediately' in Options - (General) > Tabs.

So try this: Type about:config into the address bar, press Enter and accept any warning, then copy and paste the following into the search box browser.tabs.loadInBackground Now on the search result - and assuming it isn't already set to True, click the Toggle button at the right-hand end to change from False to True. You may need to restart Firefox to implement the change.

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both setting are set to true, but thanks for trying

Is the problem when you use one of these methods:

• right-click the link > Open Link in New Tab
• Ctrl+click the link
• middle-click the link using the mouse scroll wheel

That is what the above browser.tabs.loadInBackground preference covers.

If the problem is with simply left-clicking links:

Do you use any tab-related add-ons that might have updated recently?

Here is another possibly relevant preference:

(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 inback and pause while the list is filtered. Firefox should list a bunch of preferences targeting different specific scenarios.

(3) browser.tabs.loadDivertedInBackground is set to false by default. This covers the case where the link is coded to open in a new window and Firefox diverts it to a new tab instead -- Firefox switches to those immediately. If you are having problems with this kind of link, double-click the preference to switch the value from false to true.

Are we getting closer?

I overlooked your mention of bookmarks. You probably already spotted that browser.tabs.loadBookmarksInBackground preference.

That was the answer I was hoping for, thank you, browser.tabs.loadBookmarksInBackground solved it, can't thank you enough.