This browser extension automatically removes old conversations from your Slack channel sections.

Notes that it only works in the browser (not in Slack's desktop app). However, using Slack in the browser as a desktop app is easy: simply open your browser's menu and click "Install app" or "Create shortcut". Personally, I have never installed Slack's desktop app.

This extension uses Slack's internal APIs, which can potentially change at any time.

• download chrome-slack-sections-cleaner-x.x.x.zip and extract its content,
• open chrome://extensions,
• activate Developer mode,
• click Load unpacked and open the folder containing the content of the zip file.

• use the Developer or Nightly edition of Firefox,
• download chrome-slack-sections-cleaner-x.x.x.xpi,
• open about:config and set xpinstall.signatures.required to false,
• open about:addons,
• click the cog wheel, Install Add-on From File..., and select the xpi file,
• (optional) reopen about:config and set xpinstall.signatures.required back to true.

Click the extension's icon and enter:

• one or more workspace names,
• one or more section names,
• the number of days for a channel to be considered unused.

Then close and reopen Slack.

The cleaning task is performed one minute after startup (unless it's been performed less than 24 hours ago), then every 24 hours.

To confirm that things are working, open the developer tools and look for the logs starting with [Slack Sections Cleaner].