Firefox has a config option (browser.tabs.remove.autostart.2) enabled by default. My Firefox was hanging, so I checked the process and it looked suspicious, so I verified the same with a new Firefox installation (but it looked ok). First, could some one confirm that below is genuine? also, what does intPrefs, boolPrefs, stringPrefs  arguments for?      ubuntu   14891 21.7  3.6 2213104 295320 ?      Sl   22:23   0:09 /usr/lib/firefox/firefox     ubuntu   14945  4.4  1.9 1876248 153596 ?      Sl   22:23   0:01 /usr/lib/firefox/firefox -contentproc -childID 1 -isForBrowser -intPrefs 5:50|6:-1|18:0|28:1000|34:20|35:5|36:10|45:128|46:10000|51:0|53:400|54:1|55:0|56:0|61:0|62:120|63:120|98:2|99:1|114:5000|124:0|126:0|137:10000|162:24|163:32768|165:0|166:0|174:5|178:1048576|179:100|180:5000|182:600|183:4|184:1|193:3|206:60000| -boolPrefs 1:0|2:0|4:0|26:1|27:1|30:0|33:1|37:1|38:0|39:0|40:0|43:1|44:1|47:0|48:0|49:0|50:0|52:0|57:1|58:1|59:0|60:1|64:1|65:1|66:0|67:1|68:1|69:0|70:1|73:0|74:0|77:1|78:1|82:1|83:1|84:1|85:0|86:0|88:0|89:0|90:1|91:0|92:1|95:1|97:0|100:1|101:0|108:0|113:0|116:0|118:1|119:1|121:1|125:0|127:0|129:0|131:1|132:1|138:1|139:0|140:1|142:0|153:1|160:0|161:0|164:1|167:0|169:1|171:1|172:0|177:0|181:1|186:0|187:0|188:0|189:1|190:0|191:1|192:1|195:1|198:0|199:0|200:1|201:1|202:0|203:1|204:1|205:1|207:0|208:0|210:0|218:1|219:1|220:0|221:0|222:0| -stringPrefs 3:7;release|96:0;|141:3;1.0|158:332;  ¼½¾ǃː??։֊׃״؉؊٪۔܁܂܃܄ᅟᅠ᜵           ???‐’․‧??????? ‹›⁁⁄⁒ ⅓⅔⅕⅖⅗⅘⅙⅚?⅜⅝⅞⅟∕∶⎮╱⧶⧸⫻⫽⿰⿱⿲⿳⿴⿵⿶⿷⿸⿹⿺⿻　。〔〕〳゠ㅤ㈝㈞㎮㎯㏆㏟꞉︔︕︿﹝﹞?．／｡ﾠ???￼�|159:4;high| -schedulerPrefs 0001,2 -greomni /usr/lib/firefox/omni.ja -appomni /usr/lib/firefox/browser/omni.ja -appdir /usr/lib/firefox/browser 14891 true tab   It is more readable below:  /usr/lib/firefox/firefox  -contentproc  -childID 1  -isForBrowser  -intPrefs 5:50|6:-1|18:0|28:1000|34:20|35:5|36:10|45:128|46:10000|51:0|53:400|54:1|55:0|56:0|61:0|62:120|63:120|98:2|99:1|114:5000|124:0|126:0|137:10000|162:24|163:32768|165:0|166:0|174:5|178:1048576|179:100|180:5000|182:600|183:4|184:1|193:3|206:60000|  -boolPrefs 1:0|2:0|4:0|26:1|27:1|30:0|33:1|37:1|38:0|39:0|40:0|43:1|44:1|47:0|48:0|49:0|50:0|52:0|57:1|58:1|59:0|60:1|64:1|65:1|66:0|67:1|68:1|69:0|70:1|73:0|74:0|77:1|78:1|82:1|83:1|84:1|85:0|86:0|88:0|89:0|90:1|91:0|92:1|95:1|97:0|100:1|101:0|108:0|113:0|116:0|118:1|119:1|121:1|125:0|127:0|129:0|131:1|132:1|138:1|139:0|140:1|142:0|153:1|160:0|161:0|164:1|167:0|169:1|171:1|172:0|177:0|181:1|186:0|187:0|188:0|189:1|190:0|191:1|192:1|195:1|198:0|199:0|200:1|201:1|202:0|203:1|204:1|205:1|207:0|208:0|210:0|218:1|219:1|220:0|221:0|222:0|   -stringPrefs 3:7;release|96:0;|141:3;1.0|158:332;  ¼½¾ǃː??։֊׃״؉؊٪۔܁܂܃܄ᅟᅠ᜵           ???‐’․‧??????? ‹›⁁⁄⁒ ⅓⅔⅕⅖⅗⅘⅙⅚?⅜⅝⅞⅟∕∶⎮╱⧶⧸⫻⫽⿰⿱⿲⿳⿴⿵⿶⿷⿸⿹⿺⿻　。〔〕〳゠ㅤ㈝㈞㎮㎯㏆㏟꞉︔︕︿﹝﹞?．／｡ﾠ???￼�|159:4;high|  -schedulerPrefs 0001,2  -greomni /usr/lib/firefox/omni.ja  -appomni /usr/lib/firefox/browser/omni.ja  -appdir /usr/lib/firefox/browser
122636
I've discovered this yesterday, as it was generating system load on otherwise idle Ubuntu 14.04 Desktop machine.  Today, I've confirmed such behavior also on another Ubuntu instance (17.10 in Virtualbox VM)  The sub-process in command line looks like below ( I've put this as picture below intentionally to prevent askubuntu.com from changing/escaping the content )   For me it looks like exploit/malware. Or at least there is something to hide.  this happens even for url
107629
I need to run Firefox Developer Edition (67.0b3.) and Firefox (regular version) simultaneously, but whenever I try to run the second instance I get this error message:     Firefox is already running, but is not responding. To open a new   window, you must first close the existing Firefox process, or restart   your system.   I remember that when I first installed Firefox Developer Edition, there was an option in the Settings to use separate profiles for Firefox Developer Edition and Firefox. Now I don't see that option in the settings.  How to achieve that profile separation? Maybe it can be done by manually editing profiles.ini?
87299
All of my Firefox extensions were spontaneously and simultaneously disabled (converted to Legacy status) a few moments ago.  How can I re-enable them? Firefox 66.0.3 (64-bit)
85484
I am running SysInternal's  and FireFox 3.6.2. I have noticed that while I can have Internet Explorer 8 open in multiple virtual desktops, you can not do the same with Firefox. If you try you get the error message:     Firefox is already running, but is not   responding. To open a new window, you   must close the existing Firefox   process, or restart your system.   I did a little digging around to work around this and came up with creating a second profile via the Firefox profile manager (accessed by starting Firefox with the "-p" switch). This unfortunately created a new problem which is my add-ons (of which I use many) do not stay synchronized between profiles.   Is there a better approach here?
112582
I'm sorry if this isn't the place to ask this, but there doesn't seem to be a web security stack exchange site, so this looks like the closest thing to me. If there's a better place to put this question please let me know.  I'm using Firefox on Ubuntu and I accidentally clicked an ad that took me to an obvious scam site. There's no changed behavior on my computer, but just to be safe I'd like to know what you should do after visiting an unsafe site. Thanks
51709
I'm using Slackware. Firefox is running. I also have a virtual machine running Ubuntu 16.04 using VirtualBox.  I've installed Firefox on the virtual machine, and Firefox is installed on the host computer.  I opened an SSH session in the virtual machine and ran Firefox. It opened a new window of my host computer's Firefox.  Why did it do this? I was expecting two running instances of Firefox: one on my host computer and one on the virtual machine.
21868
I have run sudo apt purge firefox, and I have gone through all of the /.config files, etc., and Software Updater is still asking me daily if I want to install the &quot;English Language Pack for Firefox&quot;. I don't have Firefox installed. How can I stop the updater from asking to update something on a program that doesn't exist? Output of dpkg -l | grep firefox: ii  firefox-locale-en                          88.0+build2-0ubuntu0.18.04.2        amd64        English language pack for Firefox
101624
This morning I woke up to:    and the FireFox help page doesn't really help...  Help!  What should I do now??? I need NoScript and AdBlock Plus to improve my surfing speed!!! 0:-)
64678
I have a 64-bit Ubuntu. For the preinstalled Firefox I had to download the 64-bit plugins (, ); the 32 bit plugins didn't work. Then I downloaded Firefox from , which just has one version to download, and it does not state whether it is 32 bit or 64 bit (as of november 2010). Using this downloaded Firefox all the 64-bit plugins no longer work. I had to download the 32 bit plugins.  How can I tell whether my Firefox is 32 bit or 64 bit?
28376
No matter what changes i make to file associations (actions) in the 'Applications' tab in Firefox, they're totally ignored. For example, i set .wmv and .avi files to open with 'smplayer' but when i download a file and double-click on it (through the 'Downloads' window), it keeps opening with Totem player.    The default file associations through nautilus ('open with' tab) work fine, i.e. i've set smplayer as the default player and when i double-click a video file it open correctly.  I've tried to delete and recreate mimetypes.rdf but that didn't help.  Any ideas on what else should i check?
75019
Abiword starts automatically each restart, on any user. Already checked out Startup Applications. Remember session is turned off.   ()  Additional info, may be it'll give a clue - I configured VNC server on this machine to run, so sometimes, in additional to regular Ubuntu/Unity sessions I start XFCE4 session. I think this behavior started after VNC4 configuration, but ~/.vnc/xstartup does not contain abiword - just regular xfce startup stuff.  What are additional places where I can look?
16431
I've downloaded Firefox and it's now sitting on my desktop as Firefox.dmg. When I double click on Firefox.dmg it opens up a window with Firefox in it so I can use it - does this mean the application has been installed?    Community Wiki'd the question because I think it's a worthwhile question to have on the site for pointing people to, it's not exactly intuitive to do and not a question I think I deserve any rep from.
48345
Self descript. I know it's already been asked  and . But apparently it's still an issue. This only started happening to me this week that I've noticed. Per the comments in the linked answer, a hard refresh should fix it but alas, it does not. Firefox 57.0. Works on SE but doesn't work on SO or many of the other sites I visit.   I disabled my add-ons and did a hard refresh but still to no avail. I've exited my browser cleared my temp stuffs as well.
46107
Firefox can run in different profiles, that can be setup using different plugins, for different purposes such as basic web browsing, web development, trading on ebay etc...  Is it possible to run more than one of these at a time, or does Firefox always run as a singleton?
58444
I want to explain my problem with Images and Links,but I don't have reputations so I posted same question in the following link.    can check it and suggest me. Thanks  I am using Ubuntu 12.04.I tried to open this .I got the page in the following way. I searched some forums, one guy suggested Ubuntu not supported to silverlight so you need to install moonlight.  so I downloaded moonlight from this .I installed in the following way   Open Firefox and drag and drop the file into Firefox.it shows successfully installed.   I reopen Firefox and reopen these same .It showing blank page(white page).like this   How can I fix this, can anyone suggest me  Thanks.
63810
I have just updated to 18.04, and cannot right-click and get the little menu to select &quot;Always on top&quot; for Firefox/Chrome, but I can do so for the terminal, pdfs, etc. (along with other things like Minimize, Maximize, Move, etc.)  It appears to be a known issue (), but does not, as far as I can see, have a known fix... Thoughts appreciated. Thanks.
14019
Is there anything in the current Firefox similar to the Task Manager in Google Chrome? (Shift + Esc)  There is something that occasionally takes up enough CPU to make Firefox unresponsive - but with multiple windows, each with a dozen or so tabs open, trial &amp; error is going to take a while.