Toggle CSS outline
Simple extension that toggles a red outline around all elements in a page on/off, useful for CSS debugging.
Toggle CSS outline
Add-on stats
Weekly download count: 5
Firefox on Android: No
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- activeTab
- tabs
- storage
- <all_urls>
Size: 17.09K
Ranking
Other platforms
Not available on Android
Not available on Edge
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Add-on summary
This extension adds a browser button that toggles a red outline on/off around all elements on a page. Useful for CSS development, to see all the borders of all elements in one glance quickly without opening the developer tools panel. Basically it sets the following style on / off:
- { outline: 1px solid red; }
Source code: https://github.com/theodejager/toggle-css-outline
Add-on safety
Risk impact
Toggle CSS outline requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Toggle CSS outline has earned a fairly good reputation and likely can be trusted.
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