Debug CSS
By: Pranay Joshi
Adds outline to all elements on the page to show the culprit element which is changing desired layout
hit `Alt+Shift+C ` key to toggle the extension
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Features & Capabilities
User Growth & Download Statistics
- By:
- Pranay Joshi
- Daily users:
- 1,020 -25
- Rating:
- 4.79 (14)
- Version:
- 1.1resigned1 Last updated: 2024-04-26
- Version code:
- 5732111
- Creation date:
- 2018-09-28
- Risk:
- Very low risk impact Low risk likelihood
- Permissions:
- Size:
- 24.12KB
- Email:
- pr*****@gmail.com
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-19
- Compare stats and ranking:
- Debug CSS vs Toggle CSS outline
- Debug CSS vs Css Debug with Pesticide CSS
- Debug CSS vs Layout Debugger
Ranking
For Developers
Contact the developer
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User Reviews
Users appreciate Debug CSS for its simplicity, usefulness in web development, and effective Ctrl shortcut to display element information. However, some users report that the Ctrl feature to see element info sometimes does not work, which affects their experience. Overall, the add-on works well and is valued for its straightforward functionality. Pros
- Simple to use with a convenient shortcut, no cluttered menus or buttons
- Extremely useful for web development and making websites
- The Ctrl feature to show element info is highly appreciated
- Works well and reliable
Cons
- The Ctrl shortcut to see element info does not work for some users
Recent reviews
by fr*****, 2025-07-22
by Gr*****, 2025-07-11
Does exactly what it says. No pesky menus or buttons, just a nice shortcut, the way it should be. A great find.
by Fi*****, 2025-04-22
Is Debug CSS Safe?
Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
Debug CSS does not require any sensitive permissions.
Risk impact analysis details
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.
Debug CSS has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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