More readme

README.md

@@ -6,16 +6,18 @@
 
 Season Pass Pass is a browser extension for Firefox and Chrome that lets you view any previous Season Pass on Bungie.net and claim rewards from them.
 
+<img src="./screenshot.png" height="256">
+
 > Note: This extension requires permission to view all requests/data for bungie.net. See [Permissions](#permissions) for more details.
 
 ## Installing a release
 
-I did not submit this extension to Firefox and Chrome review soon enough, so it is not yet available for install from the respective browser extension sites. Instead, you can install the extension manually using the browser's developer mode, which is fairly easy.
+I didn't submit this extension to Firefox and Chrome review soon enough, so it is not yet available for install from the respective browser extension sites. Instead, you can install the extension manually using the browser's developer mode, which is fairly easy.
 
 ### Chrome
 
 1. Download the latest release from [Releases](/~https://github.com/joshhunt/season-pass-extension/releases) and unzip to a safe spot.
-2. Go to Chrome's Extension page: "Three dots menu" > Settings > Extensions (or, navigate to chrome://extensions)
+2. Go to Chrome's Extension page: "Three dots menu" > Settings > Extensions (or, navigate to `chrome://extensions`)
 3. Turn on Developer Mode via the toggle on the top right of the page
 4. Click the "Load unpacked" button at the top right and select the unzipped extension folder from step 1.
 5. You should see the <img src="./public/icons/icon_16@2x.png" height="16" style="vertical-align: middle"> Season Pass Pass extension display in the list of installed extensions.
@@ -27,9 +29,16 @@ I did not submit this extension to Firefox and Chrome review soon enough, so it
 2. Go to the page `about://debugging` and click "This Firefox" in the right hand menu.
 3. Click the "Load temporary Add-on..." button and select the zipped extension from step 1.
 4. You should see the <img src="./public/icons/icon_16@2x.png" height="16" style="vertical-align: middle"> Season Pass Pass extension display in the "Temporary Extensions" list.
-5. The extension will automatically be removed when you restart Firefox, so if you want to use it again you will need to reinstall it.
+5. The extension will automatically be removed when you restart Firefox. If you want to use it again you will need to reinstall it.
+
+## Using the extension
 
-<!-- ## Using the extension -->
+1. Visit Bungie.net and log in with your Destiny/Bungie.net account.
+2. Click the extension's toolbar icon (or from the jigsaw extension menu in Chrome), and click the "Change previous season" button to select the season to pull rewards from.
+   - If the extension still reads "Visit Bungie.net to initialise Season Pass Pass", try refreshing the page and reopening the extension
+   - If the extension does not display the above message, but the "Change previous button" is not visible, try leaving the menu open for a little while longer for it to download the required data.
+3. Visit the [Previous Season](https://www.bungie.net/7/en/Seasons/PreviousSeason) page and claim rewards. Be sure to view the rewards available on each character.
+   - If the Previous Season page displays a spinner forever, make sure you're logged in and hard refresh the page.
 
 ## Building from source