User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:34.0) Gecko/20100101 Firefox/34.0 Build ID: 20141201111703 Steps to reproduce: I was looking to report this against Devtools, but couldn't find the right component. This morning, I started firefox and I got a single new tab. In the History menu, "Recently Closed Tabs" and "Recently Closed Windows" were greyed out. I am using Firefox (firefox-34.0-1.fc20.x86_64) on 64-bit Fedora 20. Actual results: I have set Firefox to "Show my windows and tabs from last time" on startup, but even though I had a few tab groups with a large number of tabs in each one, none of them opened. I proceeded to open a few tabs, pinned some of them and then closed Firefox. When I started it again, I got a single new page and no access to my previous tabs or windows. I repeated the process another 3 times - same result. I checked my system logs and noticed this line, appearing 5 times since last night: gnome-session[1798]: ols.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < devtools.require<@main.js:18:12 < @main.js:23:29 < startup@file:///home/<user>/.mozilla/firefox/<my_ff_folder>.default/extensions/adbhelper@bootstrap.js:89:16 < XPI_callBootstrapMethod@XPIProvider.jsm:4305:9 < XPI_startup@XPIProvider.jsm:1968:13 < callProvider@AddonManager.jsm:208:12 < _startProvider@AddonManager.jsm:667:5 < AMI_startup@AddonManager.jsm:821:9 < AMP_startup@AddonManager.jsm:2399:5 < AMC_observe@addonManager.js:55:7 Then I checked the extension folder/script mentioned in the log: ls -lh /home/<user>/.mozilla/firefox/<my_ff_folder>.default/extensions/adbhelper@mozilla.org/ total 144K -rw-r--r--. 1 <user> <user> 2.7K Dec 18 01:47 adb-client.js -rw-r--r--. 1 <user> <user> 34K Dec 18 01:47 adb.js -rw-r--r--. 1 <user> <user> 1.9K Dec 18 01:47 adb-running-checker.js -rw-r--r--. 1 <user> <user> 2.8K Dec 18 01:47 adb-socket.js -rw-r--r--. 1 <user> <user> 2.7K Dec 18 01:47 bootstrap.js -rw-r--r--. 1 <user> <user> 1.1K Dec 18 01:47 install.rdf drwxr-xr-x. 2 <user> <user> 4.0K Dec 18 01:47 linux64 -rw-r--r--. 1 <user> <user> 4.1K Dec 18 01:47 main.js -rw-r--r--. 1 <user> <user> 6.6K Dec 18 01:47 scanner.js -rw-r--r--. 1 <user> <user> 53K Dec 18 01:47 subprocess.js -rw-r--r--. 1 <user> <user> 8.9K Dec 18 01:47 subprocess_worker_unix.js I do not recall explicitly installing it and judging by the timestamps, it was installed last night. I opened firefox again, went to the Add-ons tool and disabled adbhelper (it was last updated on 12/18/2014). Upon restarting Firefox, I was offered to restore my session from last night, which I did. All tabs and groups were back, but no sign of the others I had randomly opened in between the sessions. Expected results: (Firefox should have restored my previous session)

It even seems to destroy more. *undo close tab does not work* anymore. *Browser console* (ctrl+shift+k) not, also not from the extras, web dev menu. Disabling this new mysterious addon helps (needs a restart). Enabling an restarting brings back the symtoms. I just wrote on input.mozilla.org: "sad" - there is a "ADB Helper" which looks like it was inserted by malware. Probably just another bloatfox thing. Bad info available! Only a link to the github repository.

edit: I am using Firefox 34.0.5 on 64 bit Linux. The addon was written at 17. Dec, 23:42 (UTC) into my profile (... /extensions/adbhelper@mozilla.org/ ).

Some more info: in a fresh profile I did not have this extension. It got pulled in as soon I started Firefox' WebIDE - clearly visible (along with many WARN about exceptions). I did not have problems to undo close tab - even after a restart. So, I guess this unwanted addon interferes with one of my other Firefox addons. That may be even that other addon's fault, however, Mozilla should just not pull in a addon which I never wanted (and not even providing info about the addon - why it is there, who put it there...). Sorry guys, that really went wrong (whatever good intentions you had).

Apparently this is THE info page about this addon https://developer.mozilla.org/en-US/Firefox_OS/Using_the_App_Manager

Sorry for the trouble this has caused. The addon implements part of the functionality of WebIDE: connecting to devices. Anyway, I'm about to revert the cause of this issue in an update for the addon. See bug 1113539.

After checking for updates, I've got ADB Helper 0.7.3. Is that the one?

(In reply to alexpl from comment #6) > After checking for updates, I've got ADB Helper 0.7.3. Is that the one? Yes, does that resolve the problems you are seeing?

Yes, after enabling it and restarting firefox a couple of times I get my session back as it was. Thank you

(In reply to alexpl from comment #8) > Yes, after enabling it and restarting firefox a couple of times I get my > session back as it was. > > Thank you Great, I'm glad to hear that! Once again, sorry for the trouble!