If your computer is low on memory or other programs on it are using that memory, Firefox might be "unloading" your inactive tabs to free up memory on your computer.

You can try disabling this feature by going to the about:config page in Firefox and setting the browser.tabs.unloadOnLowMemory preference to false. You will need to restart Firefox to see a difference. If the preference doesn't exist for whatever reason, you may need to add it.

Hope this helps.

Hi Wesley: I am having a difficult time finding the about:config page in Firefox. I go to Help and About and does not work. I go to Settings and cannot find it there. Finally found a doc which describes about:config but no link to click on to take me there. Stan

Because it's an internal Firefox page, there's no way for a website to post a link to it. It's also not included in any of the Firefox menus.

It can be accessed simply by typing about:config in the Firefox address bar.

See Configuration Editor for Firefox.

Hope this clears things up.

Hi Wesley:

Thanks for all your help on this matter. I did find the about:config in the Firefox bar, and then browser.tabs.unloadOnLowMemory preference and it was already set to false. I guess that was a false lead (pun intended). I am running 7 Windows at same time in Firefox each with between 4-15 tabs. Maybe FF cannot handle so many tabs, but I bounce back and forth between these Windows and different tabs, dependent upon the research I am conducting, each day. Any additional thoughts?

Thanks,

Stan