O.K. Right at the moment I cannot think of anything else.
But, from virustotal:
Code insights
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Package: Dark Reader (xpi)
Version: 4.9.123
Description: MSG_extension_description
The Dark Reader extension (version 4.9.123) provides dark mode functionality for websites.
Its manifest.json requests broad permissions (<all_urls>, storage, tabs, alarms, contextMenus, theme), which are justifiable for its stated purpose of applying themes globally and offering automation features.
The core logic resides in background/index.js, which manages settings, loads configuration files (site lists, theme fixes, color schemes) from local or remote GitHub sources, and dispatches theme data to content scripts.
The inject/fallback.js script applies a basic dark theme early in the page load and includes a compatibility fix for Microsoft Teams by overriding CSSStyleSheet.prototype.cssRules.
The UI scripts (ui/popup/index.js, ui/options/index.js, ui/devtools/index.js, ui/stylesheet-editor/index.js) handle user interaction and communicate with the background script.
While loading configuration from remote sources introduces a supply chain risk, the parsing logic for these files appears to handle CSS and structured data, not arbitrary executable JavaScript.
There is no evidence of malicious activities such as data exfiltration, unauthorized actions, or code injection beyond applying styling. The ‘activation’ related code appears to be local UI state management for a premium/donation feature, not external communication.
Denying access would make sense in some cases. I am sure there are a lot of sites that would deny access coming from foreign countries.
The drug store here in the US, which in the US sell a lot of items besides Rx, denies me access when I am in Europe. In a way it makes sense. Why would someone in the EU shop at a drug store in the US?
I think most shopping sites effectively deny foreign access by lifting the delivery charges. That makes sense.
Internet shopping does not always make sense… eg with clothes fitting is an issue. It is really good for rare objects…eg books, old auto parts.
It’s wasteful but some people are willing to pay for the service of free shipping with some of these site, like Amazon. Order clothing and just return it if does not fix right or color was not what was expected. Just return it at no cost.
I was just over at ChatGPT and it showed me a change to Firefox at about:config as another option. That change is made directly to Firefox and no extension is needed.
Tested and it works.
Briefly here is the change I made to Firefox.
about:config
add “general.useragent.override”
add to value field “Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.0”
Save
Restart Firefox
