Custom Search Engine
To use, type 'ms' plus keyword for custom search engines & search term into the url bar. (e.g. ms google <search text>).
Prevent Google Chrome from auto-adding custom search engines
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Stop websites from adding custom search engines with this simple extension.
This extension does not connect to any third-party servers.
Its source code is available here:
https://github.com/gregsadetsky/chrome-dont-add-custom-search-engines
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Updated July 22nd, 2019
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Store average score: 3.6. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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To use, type 'ms' plus keyword for custom search engines & search term into the url bar. (e.g. ms google <search text>).
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Alas, this extension stopped working. Not sure as of which version of Google Chrome when it became ineffective. I was doing some maintenance, checked the search engines list, and there were many entries for sites that I had previously visited and used their search that were now listed in Google Chrome's search engine list -- all the while using this extension. I edited the search engine list to remove the unwanted entries (those that covertly add themselves to Google Chrome), revisited the sites, did a search there, and this extension did absolutely NOTHING to block those sites from adding their search URLs to the search engines list in Google Chrome. Example sites that add to the custom search engines list are: aol.com, yahoo.com, bing.com, ask.com, fleetfarm.com, gasbuddy.com, menards.com, 800notes.com, amazon.zom, bestbuy.com, ebay, and newegg.com. It is easy to spot the covert search engine additions when looking at the search engine list: they don't have a keyword assigned. Uninstalling and reinstalling this extension does not get it working. It might even show a number overlay on its toolbar icon as though it blocked the custom search addition but, nope, it didn't block anything. It has not been updated in over a year and a half. It's become useless and the author has abandoned this extension so it will not get updated to start working again (assuming however this extension worked before is still a viable method in the latest versions of Google Chrome).
Doesn't seem to work anymore
FAKE
The new version has been working good so far.
While some custom searches are certainly being blocked, a list is still accumulating in Chrome's Settings. I posted a suggestion that the developer provide some kind of blacklist for sites we find are still being added to Settings. (Of course, I don't know if such an option is even possible.) If something like that happens or the developer finds another way to block the custom searches that are still getting through, I will joyfully amend my rating. Update: I now have over sixty useless and unwanted "search engines" in my Chrome settings, so, obviously, this extension does next to nothing. (I've lowered my rating from "okay" to "disliked".)
It blocks a number of sites but still a fair number of sites add their search engines.
Not at all helpful. Doesn't do anything.
not working
Unfortunately, this extension doesn't work at all. I can't believe Google doesn't give users the option to disable this unwanted behavior!
doesn't work as expected in Chrome 61.0.3163.100.