Yes, that is possible. Here is how to change that search engine to Bing.

With about:home showing in the active tab, {Shft + F4 to open Scratchpad - Execute > Run this script to change the about:home search engine to Bing

 
SearchEngines = {Bing: {"name": "Bing", "searchUrl": "http://www.bing.com/search?q=_searchTerms_","image": "data:image/png;base64,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"}}

localStorage["search-engine"] = JSON.stringify(SearchEngines["Bing"]);

document.location.reload();
  

That's great, thanks! How would I change it to DuckDuckGo?

see my posting further down - "Maybe the 3rd time is the charm".

see my posting further down - "Maybe the 3rd time is the charm".

I did that, but when I tested it by typing in "hello" it searched DuckDuckGo for "search". I tried to search something else and it did the same thing!

see my posting further down - "Maybe the 3rd time is the charm".

Once again, thank you for your help!

Sorry, I was editing my last posting while you posted.

Meanwhile, I found this - http://help.duckduckgo.com/customer/portal/articles/216441

I should be able to get it to work now.

"Maybe the 3rd time is the charm".

SearchEngines = {DuckDuckGo: {"name": "DuckDuckGo(SSL)", "searchUrl":
"https://duckduckgo.com/?q=_searchTerms_", "image": 
"data:image/png;base64, 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"}}

localStorage["search-engine"] = JSON.stringify(SearchEngines["DuckDuckGo"]);

document.location.reload();

See also:

• [/questions/779082] how to change "about:home" search engine
• http://forums.mozillazine.org/viewtopic.php?f=7&t=2158301&start=15

• [/questions/933343] How can I change the "about:home" homepage's search engine and logo to Bing?

None of those threads covered DuckDuckGo specifically. I haven't seen that search website mentioned with regards to search container in about:home before, so I did one up myself. The biggest problem I had was with the favicon being too small an image, while the data size was very close to 10K - then I realized that it contained three different sized images. I stripped out two of the sizes and left the 32 x 32 sized image, with an online favicon converter.

This last script worked perfectly, thanks for your time.

You're quite welcome!