No. Firefox 52 ESR was the last Firefox release that supported Legacy extension. Even if you would use a recent developer build that still supports Legacy extension then it isn't guaranteed that the extensions still work because support for a lot of XUL code has been removed.

For extensions like Live Http Headers you can use the builtin developer tools.

• https://developer.mozilla.org/en/Tools
• https://developer.mozilla.org/en/Tools/Network_Monitor
• https://developer.mozilla.org/en/Tools/Page_Inspector/How_to/View_fonts

Others have WebExtension replacements, but for an extension like Tab Mix Plus you would t least need several extensions for main features that are possible in a WebExtension.

For Saved Password Editor there is no replacement when it comes to adding a new password, but you can double-click username and password fields to edit these fields.

Firefox 60 ESR is based on the Firefox 60 Release. The updates are for security and allowed stability fixes as an Extended Support Release made for Enterprise users in mind.

Thanks I think I will stay in firefox 56 for a long time , still have a lot of add-ons without any replacement . Tab-mix plus have a feature of session manger which save last and privious of last session , which save my work many times , any kind of replacement for recover sessions ?

Thanks

See:

• [/questions/1238287] How do we recapture all windows and tabs from previous sesson?

After read about news features in tabs , I finally moved to Firefox 65 , recap the changes:

• Live Http Headers -> Http Header live ( https://github.com/Nitrama/HTTP-Header-Live )
• zoom images -> rotate and zoom imges
• open in browser is now available
• How do we recapture all windows and tabs from previous session? /questions/1238287 more or less , hopefully I didn't need it
• save password editor , in left mouse menu filled we may edit , is better than nothing , but we can't create password from form .
• from tab mix plus I'm still missing multiple tab rows, we got many requests on this subject

/questions/1188569 I want an add-on or feature that gives me multiple tab rows like TabMixPlus did, and the Tab Groups option

Note that Firefox has the Network Monitor as part of the developer tools.

• https://developer.mozilla.org/en-US/Tools/Network_Monitor

You can double-click the username and password field in the Password Manager to edit these fields.

cor-el said

Note that Firefox has the Network Monitor as part of the developer tools.

• https://developer.mozilla.org/en-US/Tools/Network_Monitor

Network monitor is not the same thing of http live headers , with http live headers I can copy all headers and all request at same time . (If you try it, you'll see the difference) .

You can double-click the username and password field in the Password Manager to edit these fields.

yes, we can edit and copy fields but not create new password entry , based on html form from web page

Thanks for your reply

You can save all network monitor output as a HAR file in JSON format via the right-click context menu.

• https://developer.mozilla.org/en-US/Tools/Network_Monitor