Block Unreachable Scripts

Name: Block Unreachable Scripts
Rating: 3 (7 reviews)
Author: em_te

By: em_te

Prevent unreachable servers from stalling websites by disabling their scripts if they previously could not load.

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Install

Features & Capabilities

Some websites load JavaScript from third-party servers that are sometimes unreachable (because of company firewalls/outdated DNS servers/bad SSLs/etc.). This will cause the website to stall (freeze) as it waits for that server to respond. The only recourse is to wait patiently for that request to time out, before the website can continue loading.

This extension will monitor those failed JavaScript requests and will skip over them if any websites try to load from those servers again. This prevents the website from stalling again. The block will only occur for 5 minutes (configurable) in case the server is restored later.

Failed requests can be viewed in the toolbar button, which shows which URLs were blocked and how long the block will last. The toolbar button only appears when scripts are blocked.

Note that this extension does not target anyone and has no black-list or white-list. Blocking only occurs if the server was previously unreachable and therefore the content would not have loaded anyway.

Test the effects of unreachable servers here: http://tinyurl.com/test-blocking-js

This extension will also redirect webpages (not inside iframes) that are unreachable and have a secondary URL hidden within it's primary URL.

User Growth & Download Statistics

Add-on

By:

em_te

Daily users:

Rating:

3.00

(7)

Version:

0.5resigned1 Last updated: 2024-04-25

Version code:

5728445

Creation date:

2017-08-03

Risk:

Permissions:

Content scripts matches:

<all_urls>

Size:

16.30KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-05

Compare stats and ranking:

Ranking

# 44,690 ▼ 23

Other rankings

#115 in script keyword 24 ▼ 1

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

em_te

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/block-unreachable-scripts/

Website:

http://forums.mozillazine.org/viewtopic.php?f=48&t=3033669

User Reviews

Once installed, it blocked youtube videos showing youtube as an unreachable domain. Alas. Deleted.

by Fi*****, 2019-11-10

good idea and really work thanks for it but if sometime dont work very well it almost block everthing(like google reacpcha or even base doman).so it should have option to exclude url thanks

by co*****, 2018-07-05

Interesting results. I might flesh out this review at a later date. A side note, for anyone who is concerned about source code: Extension source viewer https://addons.mozilla.org/addon/crxviewer/

by gr*****, 2018-06-29

View all user reviews ›

Is Block Unreachable Scripts 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.

Block Unreachable Scripts requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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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.

Block Unreachable Scripts is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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