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+# Grammalecte for Firefox and Chrome and for Thunderbird
+
+
+[Website](https://grammalecte.net)
+[Code](http://code.grammalecte.net:8080/home)
+
+
+## WebExtension
+
+This extension offers a grammar checking tool for the French Language.
+
+The grammar checker runs in a Worker launched from the background script.
+And text are analysed at users request. Results are displayed within
+the webpages.
+
+
+    Content-scripts <---> Background <---> Grammar checker (Worker)
+
+
+### Folders in the addon
+
+* grammalecte: the grammar checker (receive texts, analyse it and send back results).
+* content_scripts (what is run in content-scripts).
+* panel: browser_action panel, and other webpages (lexicon editor, conjugueur and other stuff).
+
+
+### Building the extension
+
+Extensions for LibreOffice, Firefox/Chrome and Thunderbird are generated in the folder `_build`.
+
+Required:
+
+* Python 3.7+ > [download](https://www.python.org/)
+* NodeJS > [download](https://nodejs.org/)
+  * npm (should be installed with NodeJS)
+  * web-ext > [instructions](https://extensionworkshop.com/documentation/develop/getting-started-with-web-ext/)
+
+Command to build:
+
+    make.py fr -js
+
+Build and rebuild data (may be not deterministic):
+
+    make.py fr -js -b -d
+
+If you got the source code from a zip archive, you must first uncompress the archive
+in `gc_lang/fr/dictionnaire/lexique/corpus_data`. (It isn’t possible to upload the
+source code as is to Mozilla website, as these files are considered too big).
+
+
+## MailExtension
+
+The MailExtension is built upon the Grammalecte [WebExtension](https://addons.mozilla.org/fr/firefox/addon/grammalecte-fr/)
+
+Both extensions use the same code. Only one file differs: manifest.json