I'm working on a web application where I need to detect if the user is on Firefox because it behaves differently when closing a specific window compared to Google Chrome. Right now, the codebase uses the following method to check for Firefox:
var isFirefox = typeof InstallTrigger !== 'undefined';
This detection is used in multiple .html, .js files, mostly for:
- File and folder handling (uploading, removing files, browsing folders)
- UI adjustments (fixing rendering or event handling issues)
- Closing specific windows (Firefox behaves differently from Chrome when closing windows)
The detection is also often paired with:
navigator.userAgent.search("Chrome")
My Questions:
- Is
typeof InstallTrigger !== 'undefined'still a reliable way to detect Firefox? - Would a different approach, like feature detection, be better for handling browser-specific window closing behavior?
- What’s the best way to handle cross-browser differences when closing a window?
I’d really appreciate any advice on the best way to handle this! Thanks in advance!
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