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KERR
Making moves
Status: New idea

As per this thread:

https://www.reddit.com/r/firefox/comments/12hdx1v/mozilla_needs_to_launch_their_dev_tools_in_a/

Some sites (don't have any handy right now) detect and "sabotage" your browsing if you open dev tools. For example, they'll go into a debugger mode or become unusuable, telling you to close dev tools to continue.

The thread has some ideas about detection/prevention, tbh I'm not sure if this idea is possible but it would be useful.

10 Comments
Status changed to: New idea
Jon
Community Manager
Community Manager

Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.

KERR
Making moves

KERR_1-1681956191036.png

 

^ an example of a site that blocks you if you open dev tools. Link available on request (it's a dodgy streaming site with heaps of ads 😁)

Honza
Employee
Employee

Thank you for the link! We are actively looking into this (and fixed several things in the past).

RandiO
Making moves

netmattersdotcome also detects/blocks FFv114 dev tools console.

xenothestrange
New member

This is still a problem.

For my example the site is 9anime.id (or new site they moved to)

When the developer tools are opened on some pages it spams "debugger" statements and (if you turn those off) redirects you to another page.

The other page blacks out the screen and tries to DOS the user with console.table() statements to lag out the browser.

If the console object is undefined or null then u can browse as normal but are unable to use the tools as intended. This also applies to the browser console if it's in multiple (whatever) mode rather than watching the parent process only.

dkauffman
New member

How has it been years and this is still an issue, it's only purpose is to break your browser and gum up your CPU. For a privacy-focused browser, this is a massive blind spot in safety.

The solution of "oh, well, only power users use dev tools, so who cares" is becoming embarrassing when Mozilla used to be the company looking to empower the average user.

empi00
New member

Still no solution but its a very important problem to solve, given how some websites change their content or redirect you upon discovering devtools being opened.

gauranggupta
Strollin' around

@HonzaAny update on this? Is a feature being worked on for the same ?

Also is there a way to avoid this within the browser using some settings ?

worse_is_better
Strollin' around

Still a major issue.

Most sites that do this use this scummy code or some variation of it. Currently uBlock Origin blocks this, but they're always going back and forth. This needs to be fixed in the browser. There's no legitimate reason for a site to know if a user has devtools open, and under no circumstance should a site have the ability to remove or restrict access to any of the browser's functionality.

mdk
Strollin' around

I agree that Firefox should fix this, but in the meantime, if someone really wants to look at network requests, there's an quick and easy way to do it via `about:logging`.

In other words, using things like disable-devtool is obviously useless.