I-Firefox ye-Android Isithangami Sokwesekwa

I would be very grateful if you could help me in the following problem concerning my android Firefox. In both phones I have (Samsung galaxy s20+ and galaxy s20 ultra) . During Firefox browsing only in pages with white background, black lines are appearing in my display. This is not happening in other browsers. Thanks a lot!

When I try to open browser I'm redirected to this site after clicking on log in button - detectportal.firefox.com/success.txt - what does this mean ?

Whenever I try to visit just one particular site it keeps telling me it can,t display because invalid http verb is being use.(the site is agsmeisapp.nmfb.com.ng/)plss help me

If I try to do a long press on a picture in google images I just get three vibrations and nothing happens. I can download or share the image if I go to the host site but google images specifically doesn't work.

Hey, First of all let me introduce to myself. I was a alltime Chrome user in android then I felt it was getting slower by the day both mobile and desktop then i start trying Several browsers like Brave,Opera,duckduckgo. While using brave I feel same like chrome with no difference. I dont had any privacy concerns so I left it. Then i start using Opera browser. I really like the features of opera Vpn,AdsBlocker, The only issue I felt in opera is constantly crashing while browsing and randomly getting Black or while bar (depends on which theme i am on) on the top of the screen or at the bottom and the browing was ridiculous for me so I left.

Then I start using Firefox and I really like the style and it feels premium quality staff. But I miss some features of Opera which makes my browsing a little disturbing or time consuming. suppose, Refresh: while while browing if i want to refresh the page I have to go to three dot icon and then press refresh button to refresh the page. Why can't I just simply scroll down to refresh or simply put a button on the bottom???

Page switch buttons: 2nd, There is no left right page switching buttons on the bottom why? sometime when my hands get wet my back button does not work then i face some problem. lets think my hands are dry and i can press back button but if i want to go back to previous visited page what will i do??

VPN '''There is No VPN, No Vpn which makes me think why i am here?''' I think those are the preety basic feature everybody wants. thanks..

Some 4months back from now,i have been experiencing hard life,some unknown people have been following me by hucking me thus collecting my data,and This has left my life in a dilemma situation, even if i change my accounts, they still go ahead with their habits, please

This issue mostly occures when I'm using my tablet (Tab S6) horizontally. I do not notice this on my mobile phone (Note 9) currently, it used to happen a few months ago after the major changes were made. It occures 100% of the time on YouTube when not in fullscreen mode. It occurs every once in a while when in fullscreen mode.

For other websites it occurs randomly.

Switching between desktop mode and mobile mode does not make any difference. Restarting the browser does not make a difference. Reinstalling the browser does not make any difference.

Websites that try to stick elements at the top of the screen, produce a jittery gap effect when you scroll up and down on Firefox Android.

Happens for Reddit threads, for example. This gives me a headache.

When I watch a video on YouTube its always on maximum quality 2160p and so firefox has to buffer every 5 seconds (my Wi-Fi is not very fast)

Even when I change the settings (see screenshots below ) to auto or a lower quality It changes back to the original high quality

Android 11 Xiaomi pocophone F1 Wed 14 april 2021 Firefox ver 87.0.0-rc.1