Setting a custom search engine as default in Opera

operasearchsearch-engines

I would like to use DuckDuckGo as my default search engine in Opera.
Opera versions 17+ come with a search engine manager (Menu Settings > Search > Manage search engines…), where you can add custom search engines and change the default search engine (factory setting is Google). Anyway, unlike most other browsers, the default search engine in Opera can be only changed to a different predefined search engine, not to a custom search engine. Without speculating on the reasons behind this arbitrary restriction, I wonder how it's possible to convince Opera to use a non-predefined engine as default. There should be some setting file to edit manually I guess. I've tried grabbing my user data folder ("%APPDATA%\Opera\Opera" on Windows, should be somewhere under ~/Library on OS X) for "google" and "yahoo", but I couln't find the spot.

Best Answer

This functionality doesn't exist yet in Opera Blink (currently on version 19). Remember, Opera went through a major change from Presto (12.x) to Blink (15+), and they're trying to gradually get all that functionality back bit by bit in each new release.

Additionally, there is always the danger that such functionality can be hi-jacked by malware - which is why this functionality was removed in a security fix from Opera 12.14 to 12.15 and wasn't added back in in the latest Presto version, 12.16.

From the Opera 12.15 release notes:

Fixed an issue where the search bar's default engine could be overridden by third-party apps.

So please don't assume it's an "arbitrary restriction" just because you don't like it. ;-) Also, not too long ago, Opera was the only browser allowing you to even have custom search engines. If you're happy to live with that little security hole due to confidence in your firewall/virus scanner, use 12.14 (you can use that alongside Opera Blink and even right-click on a webpage and "open with" Blink or any other browser); otherwise, you'll have to wait until this gets added back to Opera Blink, or until your favourite search engine gets added to the list of "standard" ones. You can always post to the Desktop wish-list forum.

OR

Here are the steps:

Need to create an XML file which will contain information about search engine like ShortName, Description, URL etc. Example of XML file here
Give a name to that XML file and put it here:

%APPDATA%\Mozilla\Firefox\Profiles\XXXXXXXX.default\searchplugins

or here:

%PROGRAM_FILES%\Mozilla Firefox\searchplugins

Modifying FireFox preferences file:

%APPDATA%\Mozilla\Firefox\Profiles\XXXXXXXX.default\prefs.js

Simply add/modify this line:

user_pref("browser.search.selectedEngine", "engine_name");

No needing to modify SQLite database file manually. New search engine will be added automatically after restarting FireFox.

Source

Using search prediction with custom Search Engine in Chrome

Finally found the answer (thanks to Labnol). Chrome and other new browsers are using Open Search Standard which can be used to provide more details to Web Browsers by Search Engines.

To add a new Search Engine, add this code onto your webpage.

<a href="javascript:onClick=window.external.AddSearchProvider('search.xml');" target="_self">Add Custom Search</a>

And in search.xml, add this:

<?xml version="1.0" encoding="UTF-8"?>  
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:moz="http://www.mozilla.org/2006/browser/search/">  
<ShortName>SE</ShortName>
<Description>Search using SE</Description>
<InputEncoding>UTF-8</InputEncoding>
<Url type="application/x-suggestions+json" method="GET" template="https://www.google.com/complete/search?client=chrome-omni&amp;gs_ri=chrome-ext-ansg&amp;xssi=t&amp;q={searchTerms}"/>
<Url type="text/html" method="GET" template="http://localhost/search?q={searchTerms}"/>
<SearchForm>http://localhost/</SearchForm>
</OpenSearchDescription>

See this for more information on the standard.

Best Answer

Related Solutions

Firefox – How to customize Firefox’s search engines

OR

Using search prediction with custom Search Engine in Chrome

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