As much as I like Firefox, I am unhappy lately with the inconsistencies with some extensions. Flash occasionally locks up, etc.
Ditto. But with 15% market share and growing such issues will hopefully become a thing of the past when more websites start encoding specifically for Firefox.
My FF has lately had trouble loading images, but I won't go back to IE. That is a nightmare.
Poorly designed or incompatible Extensions can cause problems with your browser, including make it crash, slow down page display, etc. If you encounter strange problems relating to parts of the browser no longer working, the browser not starting, windows with strange or distorted appearance, degraded performance, etc, you may be suffering from Extension or Theme trouble. Restart the browser in Safe Mode. On Windows, start using the "Safe Mode" shortcut created in your Start menu or by running firefox.exe -safe-mode. On Linux, start with ./firefox -safe-mode and on Mac OS X, run:cd /Applications/Firefox.app/Contents/MacOS/ ./firefox-bin -safe-mode
When Firefox is started in Safe Mode, all extensions are disabled and the Default theme is used. Disable the Extension or Theme that is causing trouble and then start normally.
If you uninstall an extension that is installed with your user profile (i.e. you installed it from a web page) and then wish to install it for all user profiles using the -install-global-extension command line flag, you must restart the browser once to cleanse the profile extensions datasource of traces of that extension before installing with the switch. If you do not do this you may end up with a jammed entry in the Extensions list and will be unable to install the extension globally.
If you encounter strange problems relating to bookmarks, downloads, window placement, toolbars, history, or other settings, use the Firefox Safe Mode to disable all extensions, themes, and optionally attempt to clean up any corrupted data.