search-extensions/ contain deprecated search_form field

[Rob--W]

This is about several extensions at https://github.com/aminomancer/uc.css.js/tree/master/extensions/search-extensions
(published at https://addons.mozilla.org/en-US/firefox/user/15140302/)

Many of the manifest.json files within contain search_form, a field that was never documented and does not do anything. I recommend updating the extensions to remove search_form. Not removing it will result in some log spam in the browser console.

I found your extensions while I was looking for uses of search_form at https://bugzilla.mozilla.org/show_bug.cgi?id=1929830