new UI for Firefox 89

Add context menu support (opt-in)

Add folder support

Compatible of Firefox 79;
Settings are moved to local now (not synced any more)

Support dark theme settings page

Support dark theme for Nightly

Localization for keyboard shortcuts name in Firefox 66 (beta)
Add Russian translation (Thanks to Neytrino-OnLine)

fix the error when {searchTerms} in search url path

Some style fix for Firefox 64+

Update styles for Firefox 64
Change es-ES locale to es

Update to fit Firefox 63

adapt new id of dark theme

Some mirror ui changes

Popup menu support browser themes

Add non utf-8 encoding support;
Localize default search providers (only apply to new users or user click restore default);

* Import and Export added
* POST support (see how)
* es-ES translation (by ElektroStudios)

fix extension fail on empty search

Due to the limitation of Firefox, web extensions may not read your search engine list nor chose default search engine for you. This extension act as a search engine, and redirect your searching to the real search engine you have chosen. After installation, you need the following actions to make this extension work:

1. config this extension as the default search engine in Firefox options;
2. open add-on option page, edit the search engine list to meet your requirements;
3. customize your firefox ui, move the "Search By..." button to a better place (on the left side of search bar is suggested).