Slack Chrome UA Spoofer by Barbaros Goren
Reports a Chrome-on-Windows User-Agent to slack.com so Slack unlocks the 'Sync with OS' automatic theme setting in Firefox-based browsers (Zen, LibreWolf, etc.).
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About this extension
Makes slack.com report a Chrome-on-Windows User-Agent so Slack unlocks its
"Sync with OS" automatic light/dark theme setting on Firefox-based browsers
(Zen, LibreWolf, Waterfox, etc.). It rewrites request headers and spoofs the
JavaScript navigator values only on slack.com every other site is untouched.
No data is collected.
"Sync with OS" automatic light/dark theme setting on Firefox-based browsers
(Zen, LibreWolf, Waterfox, etc.). It rewrites request headers and spoofs the
JavaScript navigator values only on slack.com every other site is untouched.
No data is collected.
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Permissions and data
Required permissions:
- Access your data for sites in the slack.com domain
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.0.0
- Size
- 10.69 KB
- Last updated
- 6 days ago (Jul 9, 2026)
- Related Categories
- License
- MIT License
- Version History
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