Add Search Option EX is a ads extension for chrome. it's a free extension , it has 181 active users since released its first version, it earns an average rating of 3.67 from 3 rated user, last update is 2207 days ago.
Add "Past 3 months", "Past 6 months", "Past 3 years", "Over 1 year ago", "Over 3 years ago" into Google search tools. Original is "Add Search Options". (It seems that it has been deleted from the Chrome Web Store)
You could download the latest version crx file or older version files and install it.
English, 日本語.
100% user give 1-star rating. Read reviews of add search option ex
You could find more help information from add search option ex support page.
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Probably this is NOT work. たぶん動かない。 ( written at 2022/04/18)