gather all copyright info in 'copyright' file

1 files changed, 15 insertions, 6 deletions

diff --git a/README.txt b/README.txt
index 571f0df..acff789 100644
--- a/README.txt
+++ b/README.txt
@@ -6,12 +6,21 @@ together. Such facility is necessary to enable browsing World Wide Web
 without executing nonfree software.
 
 Currently, the target browsers for this extension are Ungoogled Chromium
-and various forks of Firefox Quantum (right now, Ungoogled Chromium is
-being used).
+and various forks of Firefox Quantum (57+).
 
-This extension's development has just started. It doesn't do anything
-useful yet. See TODOS.org
+This extension is still in an early stage. See TODOS.org. Also see
+`https://git.koszko.org/browser-extension-doc/' for documentation in
+development.
 
 ## Installation ##
-The extension can be loaded into Ungoogled Chromium as unpacked extension.
-As of now, project's main directory is also the extension directory.
+The extension can be loaded into Ungoogled Chromium or a modern Gecko-based
+browser as unpacked extension. As of now, project's main directory is also
+the extension directory.
+
+## Copyright ##
+All copyright information is gathered in the `copyright' file which follows
+(loosely) the format of debian/copyright file described at
+`https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/'
+
+In general, this entire extension is available under the terms of GPLv3+ with
+various additional licenses and permissions for particular files.