Did you check your setting as well for how it is check to work when using tabs. I did what your doing and the new tab is always opened in the background tab so now sure what you got installed to cause the problem of tabs and how they show. And firefox has nothing it can do what and how Chrome works. So if you want help ask for help - bad mouthing Browser as a veil threat won't get you help either.

Hi Kottan, for opening links in the background, Firefox has different behaviors depending on how/why the new tab was opened. Could you check these settings:

(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

(3) Double-click the following preferences to switch the value from false to true as desired:

• browser.tabs.loadInBackground - when you right-click > Open Link in New Tab, or Ctrl+click, or middle-click a link (default = true)

• browser.tabs.loadDivertedInBackground - when a link was coded to launch in a new window and Firefox switched it to a new tab instead (default = false)

• browser.tabs.loadBookmarksInBackground - when you direct a bookmark to a new tab (e.g., using right-click > Open in New Tab, or Ctrl+click, or middle-click a bookmark) (default = false)

Kottan said

Quit Firefox accidentally and loose all tabs etc:
Implement a function to unable the X-Button (the Close-Button) or at least a question like "Do you really want to quit ? OK - Cancel" when the X-Button is hit !

Firefox normally saves your non-private windows as you work. You can set Firefox to automatically restore your session at the next startup (it's the first checkbox on the Options page), or you can call up "Restore Previous Session" from the menu, either:

• "3-bar" menu button > Restore Previous Session
• (menu bar) History > Restore Previous Session

To suggest a new way of handling this, you can submit feedback to one or more of the following sites:

• Feedback: https://qsurvey.mozilla.com/s3/FirefoxInput/
• Discourse: https://discourse.mozilla.org/c/firefox-development
• Reddit: https://www.reddit.com/r/firefox/
• Twitter: https://twitter.com/firefox
• Facebook: https://www.facebook.com/Firefox

Thank you, WestEnd. I'm using FF 64.0 32bit, Win7ultimate, Intel i7 I deactivated all my extensions, but >rightclick-open link in new tab< still opens in the foreground. Will try further. Any suggestion to avoid accidentally closing FF by the X-button ? Before the extension reform i had the perfect extension called "Warn before quit" but it is not more developed and there is no appropriate extension offered. (At least i could not find)

Sorry, WestEnd, i am PC-user since 1988 and i am tired of recurring disimprovement over years and years. Regards Kottan

Perfect, jscher2000, tabs open in the background now. Thank you.

Question2: "Restore Previous Session" can solve my problem, but i am spoiled by the >Ask for Quit< extension, and would like to get a similar solution. Thanks again Kottan

Hi Kottan, I can't intercept the quit keyboard shortcut, but I have created an experimental extension that keeps a window open when you try to close it. If you want to test it out:

https://addons.mozilla.org/firefox/addon/prevent-closing-window/

It uses the (usually) annoying "do you want to leave the page" prompt to do this:

You can set this pref to true on the about:config page to prevent Firefox from closing if you close the last tab.

• browser.tabs.closeWindowWithLastTab = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

• http://kb.mozillazine.org/about:config

I personally hide close buttons on tabs with code in userChrome.css to prevent closing a tab accidentally if I click the Tab bar and instead middle-click a tab to close the tab.

Add code to the userChrome.css file below the default @namespace line.

• http://kb.mozillazine.org/userChrome.css

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

#tabbrowser-tabs .tab-close-button { display:none!important;}

• https://www.userchrome.org/how-create-userchrome-css.html
• https://www.userchrome.org/what-is-userchrome-css.html