Firefox Community Forum

I get the following message when going online with Firefox: "The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem." I've followed all the prompts to restart the computer, refresh the computer, delete the favicons.sqlite and places.sqlite and it won't allow me to delete them. This happened yesterday as well. Yesterday I could delete those files and everything was restored. But today I can't get it to work.

First, is there a list of commandline options?

Second, I would like to be able to start Firefox with a specified URL from a batch file -or- a .net program. Then, either close FF -or- switch to a different URL. is this possible?

I'm unable to log in to Telephone Service Co. - TSC Wapakoneta, Ohio website using Firefox, but Internet Explorer logs in OK. TSC Customer Service indicated problem was in Firefox, but Firefox seems to work OK on other sites. TSC suggested I clear cache & cookies. Is this a good idea? If so, how do I do that?

SSL_ERROR_HANDSHAKE_FAILURE_ALERT

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

msn.com and outlook.com recently changed their login procedure and I can't login using firefox. I get an error 400.

whenever i stop, backtrack or advance a video as in youtube i can expect it to crash. the same with pages containing videos. also playing music sound clips i can guarantee a crash. this has been a problem for years.

I have been using the Firefox browser for years on the exact same computer running windows 8.1 that isn't having any issues or problems. Over the last 6 months the browser has been crashing every single day regardless of utilizing every setting mentioned in the help articles, numerous "refreshes" (numerous times it also freezes during refresh) and numerous reinstalls have done nothing. Every single day the browser crashes and I have to restart it or my whole computer. This is my last attempt to figure out what's happening before I stop ever using it again.

I'm trying to disable the alt + t shortcut in firefox and having absolutely no luck. I've searched for answers and all of the ones I've found haven't worked. I tried the about:config "ui.key.menuAccessKeyFocuses" set to true option and hiding the menu bar. Neither work. Is there anything that would work for me?

Hello. My tablet, has limited memory, due to its age. I am now finding that one of the main reasons why it is so slow is because whenever I open firefox, it opens multiple firefox processes which drain the memory and in some cases crashes the system. I have followed all the advice given to reduce these multiple processes, however nothing seems to work and at least 6-8 firefox processes open each time I open it. I have unchecked the recommended performance settings as well as hardware acceleration boxes. However, I cannot find where to set the content process limit to 1. Please tell me how to do this and if there anything else I can try to stop it opening multiple processes or I may be forced to ditch Firefox altogether for an alternate such as Bing, Chrome or DuckDuckGo. Many thanks. Charlie

Hi. I am trying to get into chase.com web without success. Why I already try several download with different browsers.