topic Firefox 151 has slowed down certain websites in Discussions https://connect.mozilla.org/t5/discussions/firefox-151-has-slowed-down-certain-websites/m-p/127746#M50749 <P>Since the 151 update several websites are now so slow I have had to use another browser.&nbsp; Websites include IMDb, Flightradar24 and even this site (yours).&nbsp; Nothing else has changed since loading 151, so it isn't any extensions, although I did waste a lot of my time disabling then to no avail.</P> Sat, 06 Jun 2026 13:49:36 GMT DavidMack 2026-06-06T13:49:36Z Firefox 151 has slowed down certain websites https://connect.mozilla.org/t5/discussions/firefox-151-has-slowed-down-certain-websites/m-p/127746#M50749 <P>Since the 151 update several websites are now so slow I have had to use another browser.&nbsp; Websites include IMDb, Flightradar24 and even this site (yours).&nbsp; Nothing else has changed since loading 151, so it isn't any extensions, although I did waste a lot of my time disabling then to no avail.</P> Sat, 06 Jun 2026 13:49:36 GMT https://connect.mozilla.org/t5/discussions/firefox-151-has-slowed-down-certain-websites/m-p/127746#M50749 DavidMack 2026-06-06T13:49:36Z