# Can not use Remote debugging on Firefox Preview for Android

**URL:** <https://discourse.mozilla.org/t/can-not-use-remote-debugging-on-firefox-preview-for-android/64307>\
**Category:** Developer Tools\
**Tags:** developer-tools, issue\
**Created:** [July 22, 2020, 12:46pm UTC](https://discourse.mozilla.org/t/can-not-use-remote-debugging-on-firefox-preview-for-android/64307 "2020-07-22T12:46:06Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![prosvirnin.arseniy](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/prosvirnin.arseniy/32/22055_2.png) [@prosvirnin.arseniy](https://discourse.mozilla.org/u/prosvirnin.arseniy)\
**Post date:** [July 22, 2020, 12:46pm UTC](https://discourse.mozilla.org/t/can-not-use-remote-debugging-on-firefox-preview-for-android/64307/1 "2020-07-22T12:46:06Z")

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Hello.  
I use FF Developers edition on my Arch Linux machine and I need to debug web app on my phone.

When I trying to load a tab from mobile device (in remote debugging). I got an error:  
_Can not connect to debug target_

Does anyone got same issue?

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**Author:** ![jdescottes](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/jdescottes/32/22185_2.png) [@jdescottes](https://discourse.mozilla.org/u/jdescottes)\
**Post date:** [July 22, 2020, 3:10pm UTC](https://discourse.mozilla.org/t/can-not-use-remote-debugging-on-firefox-preview-for-android/64307/2 "2020-07-22T15:10:11Z")

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Hi!

From what I could test, I can still connect and inspect tabs from Firefox Developer Edition.

Can you share which version of Firefox Preview you currently have installed? Maybe shared a screenshot of the about:debugging UI when you are connected to the target browser. Do you see any warning?

I think only Firefox Preview Nightly is updated now, so if you are on a regular Firefox Preview, you might be on an old version, no longer compatible with DevEdition?

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**Author:** ![prosvirnin.arseniy](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/prosvirnin.arseniy/32/22055_2.png) [@prosvirnin.arseniy](https://discourse.mozilla.org/u/prosvirnin.arseniy)\
**Post date:** [July 22, 2020, 3:48pm UTC](https://discourse.mozilla.org/t/can-not-use-remote-debugging-on-firefox-preview-for-android/64307/3 "2020-07-22T15:48:52Z")

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I updated to Firefox Preview Nightly and problem was gone.

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**Author:** ![jdescottes](https://sea1.discourse-cdn.com/flex001/user_avatar/discourse.mozilla.org/jdescottes/32/22185_2.png) [@jdescottes](https://discourse.mozilla.org/u/jdescottes)\
**Post date:** [July 22, 2020, 3:58pm UTC](https://discourse.mozilla.org/t/can-not-use-remote-debugging-on-firefox-preview-for-android/64307/4 "2020-07-22T15:58:21Z")

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Thanks for letting us know!

If you are now on Firefox Preview Nightly, you might want to use Firefox Nightly (desktop) to debug it.