chrome.extension not exported to content script

This causes e.g. the "Reddit Enhancement Suite" to not work (can't access chrome.extension.inIncognitoContext):

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'inIncognitoContext')
    at isPrivateBrowsing (foreground.entry.js:15198:29)
    at module35.shouldRun (foreground.entry.js:40259:31)
    at isRunning (foreground.entry.js:47228:177)
    at _addModuleBodyClasses (foreground.entry.js:47321:12)
    at foreground.entry.js:47350:53

To Reproduce
Steps to reproduce the behavior:

Install https://chromewebstore.google.com/detail/reddit-enhancement-suite/kbmfpngjjgdllneeigpgjifpgocmfgmb
Go to https://old.reddit.com
Open dev-tools

Extra

Probably relevant:

electron-browser-shell/packages/electron-chrome-extensions/src/preload.ts

Lines 3 to 6 in 5b60d98

    
           // Only load within extension page context 
        
           if (process.type === 'service-worker' || location.href.startsWith('chrome-extension://')) { 
        
             injectExtensionAPIs() 
        
           }

I found a workaround: Automatically adjust the "content_scripts.js" in the extension's manifest to include a chrome.extension polyfill, see #176

Maybe there is a better way though?

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chrome.extension not exported to content script #175

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	// Only load within extension page context
	if (process.type === 'service-worker' \|\| location.href.startsWith('chrome-extension://')) {
	injectExtensionAPIs()
	}

chrome.extension not exported to content script #175

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powellnorma commented on Feb 22, 2026

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