搜索不受工具限制，任意工具均可运行，比如grep, rg, ag.
Sorry to reply in English as I only have Chinese input method in palemoon, which is not allowed to log in this forum. Copied utf8 characters are not shown properly (works when copied as title), does anybody know the underlying reason?
The local file is usually used as a search engine, which could be scanned and generated by simple script or clicking proper links provided on my website.
There are other ways like bookmarks and menus for long-pressed links in file manager.
The huge amount of features (such as html5 applications) of uweb are not expected by regular browser users, so do not appear by default. Usually users need to click links on the website to install search engines/menus/buttons/scripts/configs.