User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0 Build ID: 20141027150301 Steps to reproduce: added a variable to watch pane in debugger. it shows the variable name as >>total Actual results: nothing else. that's the problem. it's just acts like a dynamic listbox rather than a watch window. Expected results: should show the content and maybe even the available properties and methods of the variable total like the watch pane used to.
this bug is back. tried in 50.0 to add watch newSuffixStr==str.substr(i,newSuffixLen) and it cleared all the watch variables.
This still seems to be a problem. As far as I can tell Watches simply do not work. This makes it substantially less useful than Firebug. If there is documentation that explains how this is not a bug, please put a link IN the inspector somewhere people can find it.
This is fixed in the new debugger. Try it in Firefox 56 or higher. See here for how it works: https://developer.mozilla.org/en-US/docs/Tools/Debugger/How_to/Set_Watch_Expressions