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Dismoi - extension

Build Status

Dis moi means Tell me in 🇫🇷 French.

Dismoi is a web extension that allows anyone to post information directly on any web page you browse. If you follow an informer, his messages are displayed at the time you visit the pages he has commented on.

To learn more about the uses cases, visit the 🇫🇷 Dismoi website.

At the time of writing, information are stored in database and exposed via the Dismoi Backend.


You can find the latest tests version of Dismoi extension on the releases page.

For the latest production version of Dismoi extension visit the official addon page of you favorite browser:

Build instructions


To the attention of the Mozilla addon reviewer.

To reach zero diff with the submitted addon, the addon must be build with node version 10.15.0.

yarn install && NODE_ENV=production yarn build:firefox

Or just run the build process with Docker:

yarn build:firefox:production:docker


The Dismoi extension requires the following permissions :

  • activeTab The extension is able to follow your navigation on the active tab, when you browse to a new URL you may receive a new information.
  • storage The extension use the sync storage area to store and sync across browser instance the following informations :
    • prefs The contributions you dismissed, disliked, liked, read. Also if you accepted the 🇫🇷 Term of Service.
    • subscriptions Which informers you are following.
    • installationDetails The extension version, date of installation, date of last update.
    • user A generated unique identifier.
    • serviceMessage The last time you saw the service message, to avoid showing it up again.
  • matches: ['*://*/*'] To potentially notify you on any page you are visiting.

    In the near future we wan't to use the declarative content API, to avoid injecting Js everywhere and further protect your private life (see #275).


  1. Clone the repository
git clone dismoi-extension
  1. Install yarn

  1. Install dependencies

To start the profiles app in development run the following command

yarn start:profiles
  1. Create a copy of .env.development.example to .env.development and adjust the values.

Read further on environments.

  1. Start the extension
yarn start

Watch files changes (but do not reload the content script though)

  1. Open chrome://extensions/,
    • activate Developer mode
    • click Load unpacked
    • and load build/development/chromium folder

Chrom(e|ium) browser is recommend for development. see


You’re welcome to help!

For further reading, refer to the Dismoi contributing guidelines.


# test everything
yarn test

For integration tests see #289


There is a Storybook for Dismoi components design, exploration, testing and documentation. It's hot reloaded. Storybook may be run with the following command:

yarn storybook

It also possible to build a static version, the one you can see here :

You can do this with:

yarn build-storybook

It is automatically deployed to on every develop branch update.




Copyright (C) 2016-2020 INSITU SAS

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU AFFERO GENERAL PUBLIC LICENSE for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see