Update release cycle doc

The docs have been updated with info on the process I follow now with
regards to releasing the extension.

Also, some markdown examples and links have been added to make my life
easier when releasing the extension.

Change-Id: I57a01667bd4e6c950875464ad8182e89aa08931f
diff --git a/docs/developers/release_cycle.md b/docs/developers/release_cycle.md
index feb9744..29a14a2 100644
--- a/docs/developers/release_cycle.md
+++ b/docs/developers/release_cycle.md
@@ -9,8 +9,53 @@
 2. [Build the extension](build.md) for both the stable and beta channels. This
 will output a ZIP file for each release channel and each supported browser.
 
-Afterwards, the release/build files must be submitted to the Chrome Web Store
-and addons.mozilla.org.
+Afterwards, the release should be published in GitHub along with a changelog,
+a notice should be published in the private extension Google Group, and the
+release/build files must be submitted to the Chrome Web Store and
+addons.mozilla.org.
+
+## Create release at GitHub
+1. Go to https://github.com/avm99963/infinitegforums/releases.
+2. Click the newly created tag and click **Edit tag**.
+3. Fill in the description with the changelog. You can use this as a template:
+``` md
+## Changes
+
+**Complete git changelog:**
+https://gerrit.avm99963.com/plugins/gitiles/infinitegforums/+log/refs/tags/{previous_version}..refs/tags/{new_version}?pretty=full
+
+### Summary of changes:
+
+- abcdef0 Commit example 1
+
+  This is a description of the commit, which explains more about what it does.
+
+  Fixes: #42
+
+- 41d1aff Convert dark mode to green mode
+- 52dbca8 Introduce lollipops
+
+  **Note:** This feature is not yet ready for launch and not available yet
+  inside the options section.
+```
+4. Upload the Chromium stable and Gecko stable release files (alternatively
+upload the Chromium beta and Gecko stable packages and mark the release as a
+pre-release if there is no intention of promoting this release to stable in the
+future).
+5. Mark the option **Create a discussion for this release** and select category
+**Releases**.
+6. Click **Publish release**.
+7. Click **Join release discussion**.
+8. Add something like this to the beginning of the discussion:
+``` md
+# Version 1.9.3
+
+## Status
+
+- **Beta channel:** pending review. It will probably take some hours to be reviewed and automatically
+published.
+- **Stable channel:** it will be available by the end of the week.
+```
 
 ## Submitting to the Chrome Web Store
 1. [Upload both release files](https://developer.chrome.com/webstore/publish#upload-your-item)
@@ -18,27 +63,26 @@
 2. [Submit both releases](https://developer.chrome.com/webstore/publish#submit-your-item-for-publishing)
 to be reviewed by the Chrome Web Store team, but in the case of the stable
 channel uncheck the "Publish automatically after it has passed review" option.
-3. Upload the beta release file to the
-[GitHub releases page](https://github.com/avm99963/infinitegforums/releases)
-under the newly created tag. Mark that release as a pre-release at GitHub.
-4. Wait until the beta release is reviewed and approved by Google.
-5. Test again the extension by using the beta channel. Check if the options have
-been transfered correctly from version to version, and wait some days (for
-instance between 3 and 5 days) to see if other people report issues with the
-updated version.
-6. If everything goes well, publish the update in the stable channel. The
-updated version should have already been reviewed by the Chrome Web Store team
-at this time.
-7. Update the release file in the GitHub releases page by removing the beta
-release file and uploading the stable release file. Also, remove the pre-release
-label.
-
-If during this process the release wasn't approved by Google or an issue was
-found during beta testing, a new release which fixes this should be created and
-the previous stable update should be canceled and superseded by the new release.
 
 ## Submitting to addons.mozilla.org
 The procedure is similar to the one with the Chrome Web Store, except for the
 fact that the stable version is directly uploaded to the store.
 
-TODO(avm99963): Add more details here.
+You can upload the new version using the following link:
+https://addons.mozilla.org/en-US/developers/addon/tw-power-tools/versions/submit/.
+
+## Promoting the beta release to stable
+After the beta release is reviewed and approved by Google, the following should
+be done:
+
+1. Test again the extension by using the beta channel. Check if the options have
+been transfered correctly from version to version, and wait some days (for
+instance between 3 and 5 days) to see if other people report issues with the
+updated version.
+2. If everything goes well, publish the update in the stable channel. The
+updated version should have already been reviewed by the Chrome Web Store team
+at this time.
+
+If during this process the release wasn't approved by Google or an issue was
+found during beta testing, a new release which fixes this should be created and
+the previous stable update should be canceled and superseded by the new release.