This preference controls whether the application will interrupt parsing a page to respond to UI events.Content.interrupt.parsing - MozillaZine Knowledge Base
yes, I want to click tabs when the page is loading. duh?
Rather than wait until a page has completely downloaded to display it to the user, Mozilla applications will periodically render what has been received to that point. Because reflowing the page every time additional data is received greatly slows down total page load time, a timer was added so that the page would not reflow too often. This preference controls the maximum number of times the content will do timer-based reflows. After this number has been reached, the page will only reflow once it is finished downloading.Content.notify.backoffcount - MozillaZine Knowledge Base
one timer based drawing session is more then enough. Drawing it before loading it takes more time. Loading may need to be delayed to find the time to draw.
Pages that were recently visited are stored in memory in such a way that they don't have to be re-parsed (this is different from the memory cache). This improves performance when pressing Back and Forward. This preference limits the maximum number of pages stored in memory.Browser.sessionhistory.max total viewers - MozillaZine Knowledge Base
ok, this was set to 50 on my fox, I've changed it into 5. I'd rather have a lot of tabs as a lot of invisible history pages loaded in memory.
Now I should restart the browser.
This line should disappear when it still works lol if this line is still here then you are advised to review the edits I've made before adopting them.