You can complain. Firefox Volunteer Support can not do anything about it. Here to help, only. To submit suggestions for new or changed features, may I suggest:

• Feedback: https://qsurvey.mozilla.com/s3/FirefoxInput/

Mozilla gave up the contract with Yahoo and now has a Contract with Google, pays the bills. If do not like it switch engines from Options --> Search.

• https://www.howtogeek.com/333805/how-to-change-or-customize-firefoxs-new-tab-page/
• https://www.howtogeek.com/333110/how-to-customize-firefox-quantum-and-remove-the-white-space-around-the-title-bar/
• https://www.howtogeek.com/334716/how-to-customize-firefoxs-user-interface-with-userchrome.css/

There are suppose to be 4 in the Task Manager and addons can put them in there also. Is called Quantum for a reason. as uses 4 cores, instead of the old 1 only, ver 58 brings multi-threading.

• https://www.howtogeek.com/332449/whats-new-in-firefox-quantum/

Loosing everything well that is why since beginning of computers there is a term called Back Up. fyi for the future :

• https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer
• https://support.mozilla.org/en-US/kb/import-bookmarks-html-file
• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

If having issues with too much ram or cpu being used : Please : Go to the Firefox 3 Bar Menu --> Help ? --> Troubleshooting Information Page and take a look in the Accessibility section if accessibility is set to "true" there. if yes, go to the Firefox 3 Bar Menu --> Options --> Privacy & Security panel and under Permissions check the setting to Prevent Accessibility Services from accessing your browser.

Monitor in Task Manager. Should stay below 2 gigs. If excessive then do below and monitor and change if need to.

Go the 3 Bar Menu then Options --> General --> Performance and untick everything. change the recommended size lower then see how it runs. Note: 1 = No Multiprocessor = slow again. Try 2 Restart Firefox after making these changes please.

Please let us know if this solved your issue or if need further assistance.

Separate Issue; Your System Details shows;

Installed Extensions;

Block site 3.1.15 ({dd3d7613-0246-469d-bc65-2a3cc1668adc}) Block Site 0.1.6 ({07046613-1993-4b66-9dd1-9dd1ce581cb7})
Having more than one version of a program may cause issues.

Pkshadow: Thanks for link to suggestions. The rest was a tad cocky! I don't care if M is using google now instead of yahoo. If I have neither as a selection for my search engine... it should not be changed when they do updates and obviously... if I'm not using them then I already know how to set it up! Thank you for the info on Quantum, that explains it.

"Loosing everything well that is why since beginning of computers there is a term called Back Up. " Yes... I use to be a tech! But, 1) Backup would be the wrong terminology! I already know how to 'save' my tabs but this has never happened with any other updates so why would I think it would happen now?!!

FredMcD: Thanks. That's because one was in legacy and must have finally updated.

I have the similar problem with firefox a lot of issue in the new update and they doesn't fix any of them from the beginning beginning of December till now.