BlockSite is an extension, which automatically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.
- By:
- Blocksite
- Daily users:
- 32,253 -239
- Rating:
- 3.71 (1,252)
2 new ratings
- Version:
- 4.0.8.3resigned1 Last updated: 2024-04-25
- Version code:
- 5725872
- Creation date:
- 2006-08-09
- Risk:
- Very high risk impact Low risk likelihood
- Permissions:
- tabs
- webNavigation
- <all_urls>
- cookies
- management
- notifications
- contextMenus
- webRequest
- webRequestBlocking
- unlimitedStorage
- tabs
- Size:
- 9.76MB
- Email:
- su*****@blocksite.co
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Browser Add-ons
- Data ingested on:
- 2025-07-13
Ranking
# 404
Other platforms
User reviews
Pros
- Effectively blocks websites as intended
- Allows targeted blocking without affecting related messaging apps, offering more control than system-level blockers
- No easily accessible unblock button, preventing accidental unblocking
- User-friendly blocking via right-click option
Cons
- Performance issues: blocks sites only after the page loads leading to a delay
- High memory and CPU usage when enabled
- Stability problems: whitelist feature turning off unexpectedly and losing saved whitelist sites
- Some compatibility issues causing sites like YouTube to not load properly when enabled
- Toolbar options are difficult to access and redirection after blocking may be inconvenient
Recent reviews
サイトをブロックするたびに別画面に移動する害悪仕様
ユーザーをなめてるとしか思えない
ゴミ
by jk*****, 2025-07-12
doesnt work
by Dz*****, 2025-07-06
Does what it says on the tin. I just wish it worked faster. The webpage loads before BlockSite blocks it. Kind of a bummer, but better than nothing.
by Ja*****, 2025-07-03
Extension safety
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.
BlockSite requires a lot of sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
- High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
- High ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****
- High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
- Medium ******* ***** *********** ***** ****** ********* *** ***** ********* **** **** ************** *** ********
- Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
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 Browser Add-ons, 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.
BlockSite has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details
Compare add-ons
- Compare BlockSite vs Block Site
- Compare BlockSite vs Block Site Extension
- Compare BlockSite vs Website Blocker
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