Firefox Add-ons

11Versions

0Code reviewed

Not reviewed

No code review on record

We have not reviewed this extension’s code, so we cannot vouch for it either way. Check the permissions below to decide whether it asks for more than it needs.

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What our analysis found

Capital One Shopping: Save Now, used by 471,093 people, is not yet reviewed by Extension Auditor. Its permissions mean it can read and change data on all websites and can observe network requests. It comes from a publisher with 2 extensions and was last updated in August 2024.

Capital One Shopping: Save Now Firefox extension security report

ID: wikibuy-for-firefox

Extension Info & Metadata

Status

Active

Version

0.1.1219

Size

4.41 MB

Rating

4.3/5

Reviews

817

Users

471,093

Type

Extension

Updated

Aug 22, 2024

Publisher Contextual Analysis

Author: Capital One Shopping
Privacy: Privacy Policy
MX records exist: Yes
Domain exists: Yes
Is disposable: No
Is role-based: Yes
Mailbox exists: Yes
Website: Visit

Extensions

Active

Obsolete

Listed

Unlisted

Users

938,098

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Screenshots & videos

Install growth

User Growth

Showing data from Sep 13, 2023 to Sep 12, 2024

Versions

-0.95%(-4,381 users)

Compared to 3 months ago

11 versions released in this period

Rating Count

Total: 683 ratings

Average Rating

Current: 4.42 / 5.0-0.05

See plans

React Flow

Internal permhash`d125e71ec4…`
No malicious matches

2 other extensions carry this fingerprint, none of them known malicious.

Withheldnot flagged
Withheldnot flagged

Permhash (Mandiant)`d6bac18ff9…`
No malicious matches

2 other extensions carry this fingerprint, none of them known malicious.

Withheldnot flagged
Withheldnot flagged

Network indicators

510 URLs and 260 IP literals were extracted from this version.

Item	Type	Severity	Description
webRequest	Permission	Critical	This permission enables the extension to monitor and analyze all web requests made by the browser. Rated Critical because it can observe all network traffic including sensitive data, track browsing behavior, and gather authentication tokens.
webRequestBlocking	Permission	Critical	This permission allows the extension to intercept, modify, or block any web request in real-time before it reaches its destination. Rated Critical because it can modify sensitive data (like passwords, credit cards) before encryption, redirect traffic to malicious sites, or block security updates.
<all_urls>	Host	Critical	Broad host access — the extension can read/modify content on every website.
Dangerous Permission Combination	Risk Factor	Critical	This extension can intercept, modify, and block web requests in real-time.
cookies	Permission	High	This permission provides full access to read and modify browser cookies. Rated High because it can steal session tokens, modify authentication cookies, and compromise accounts across websites.
Contextual Risk Factors	Risk Factor	High	The following context increases the overall risk:• 20% increase: Access to sensitive domains increases potential impact• 10% increase: Early script execution enables pre-emptive content manipulation• 15% increase: Older manifest version lacks modern security controls
Broad Host Permissions	Risk Factor	High	This extension has broad host permissions allowing it to access many or all websites.
Broad Content Script Access	Risk Factor	High	This extension can inject scripts into any website.
tabs	Permission	Medium	This permission enables tab management and monitoring. Rated Medium because it can track open tabs, access tab metadata, and monitor user browsing patterns.
storage	Permission	Medium	This permission allows storing data locally in the browser. Rated Medium because it can persist sensitive user data, track user activities over time, and potentially store malicious payloads.
Access to Sensitive Domains	Risk Factor	Medium	This extension requests access to sensitive domains: ://.capitaloneshopping.com/, ://.amazon.com/, ://.bestbuy.com/*
Early Content Script Execution	Risk Factor	Medium	This extension runs content scripts at document_start.
Older Manifest Version	Risk Factor	Medium	This extension uses Manifest Version 2
alarms	Permission	Low	This permission schedules periodic tasks. Rated Low because it can only trigger events at specified times without access to sensitive data.
contextMenus	Permission	Low	This permission adds items to browser context menus. Rated Medium because it only modifies right-click menus without access to page content.

Sensitive Domain Access

This extension has access to the following sensitive domains:

*://*.capitaloneshopping.com/*
*://*.amazon.com/*
*://*.bestbuy.com/*

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About this extension

Capital One Shopping instantly applies coupon codes to your shopping cart, helps you snag exclusive rewards when you shop at stores you love and compares prices on Amazon to other popular retailers. It's kinda genius.

User reviews

1.1 out of 5 · 10 most recent reviews

Text reviews

Positive

Negative

Causes massive lag on browser. Nothing to do with computer as mine is pretty powerful. The lag instantly went away upon uninstalling. Won't ever use again.

Wm·16 Sept 2026

lags the browser all the time and crashes tabs too. Wastes too much time and resources stealing your data and at times makes the browser unusable. Sends you "deals" to 3rd party sellers and will spam your email with multiple emails a day if you even glance at a product on almost any major website.

StinkyCheese·13 Sept 2026

Do not trust any of these high star reviews. Too many times they do not honoured their word, try to avoid paying out, and force you to record everything you do through them. Do not trust any e-mails they give you. All you may get is some shoddy gift cards. Only use if you EXTENSIVELY use gift cards that you can try and accrue over a period of time while they record your "shopping".

Extension files

Browse and explore files within this extension package

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URLs

510

IPv4

260

URLs

View the external URLs this extension communicates with to understand its network activity and data interactions.

No URLs found

No IP addresses found

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Version	Size	Verdict	Findings	Permhash
0.1.1137 Latest	6.86 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1040	7.73 MB	Not scanned	—	e082711e07843fcf7975a4b8fda6033326a7646b5d2b3bbc985cb96caa145699
0.1.1157	7.09 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1158	7.09 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1168	4.06 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1170	4.04 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1181	4.07 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1185	4.15 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1189	4.27 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709
0.1.1215	4.49 MB	Not scanned	—	d6bac18ff9db27288a3823cb17ea34a9c8ee3d72dd30f6bcc49ea42236e09709

Showing 1 to 10 of 20 rows

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Code Diff

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0 changed files detected

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Not reviewed

What our analysis found