[NAME] - I don't understand... Firefox and Edge are browsers, not "search engines", like you said.  You can have as many as browsers as you want installed, but not probably good to have more than one running at a time, because they'll be competing for system resources. So are you talking about browsing around the internet or actually using a search engine (Bing, Google, DuckDuckGo) to find something specific? If you have a lot of extensions installed in Firefox, you might try disabling them and see if things go faster. Which CPU and how much RAM (memory) are installed in your Inspiron 3891? A slow CPU and limited RAM can slow things down too... I use Firefox on my PC (latest is v106.0.3) and it's quite fast for browsing the internet. I use DuckDuckGo to search for specific topics and it's fast too.
 Hi,   I have two search engines installed in my Inspiron 3891-- Firefox and Microsoft Edge. Edge seems to be working OK, but firefox is slow slow slow--- the home page comes up pretty well, but searches  take "forever" to load-- the '"little blue circle" spins endlessly-- so slow that you almost  forget what you are searching for!! what is going on here? (The firefox version I beleive is up to date) should I just uninstall and start all over, installing it again? Id having TWO at the same time ( s to speak) the problem?  appreciate any feedback/advice...    
speeding up firefox?