Include README and licensing detail

README

@@ -0,0 +1,8 @@
+Private Nitter redirector is a webextension for directing Twitter (X) urls to a
+private Nitter instance. It supports HTTP basic authentication.
+
+The extension has been tested with Firefox and Chromium. Safari support is
+unknown at this moment.
+
+Private Nitter redirector is released under the terms of the Unlicense or, in
+case you find it unacceptable, The GNU General Public License v3.0 or later.

UNLICENSE

@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>

dialog.html

@@ -8,7 +8,7 @@
 			<legend>Redirect configuration</legend>
 			<input type="checkbox" id="enabled" class="control"><label for="enabled">Enable redirect</label><br>
 			<label for="instance">Nitter domain</label><br>
-			<input type="text" id="instance" class="control" required>
+			<input type="text" id="instance" class="control">
 		</fieldset>
 		<fieldset>
 			<legend>Authentication</legend>

manifest.json

@@ -25,5 +25,10 @@
 			"64": "icon-64.png"
 		},
 		"default_popup": "dialog.html"
+	},
+	"browser_specific_settings": {
+		"gecko": {
+			"id": "{29f1556c-bde4-469f-b8de-79aac940da26}"
+		}
 	}
 }