If you click the 3 dots on your browser itself that pulls up the little menu where you can go back a page or go to a page you just went back from, there should be a little button saying "desktop mode" or "desktop site" or something like that.
If you tell me what browser you use, I can give more accurate, step-by-step instructions
Okay cool, I have Firefox too. :)
1. Press the 3 dots on the right side of the search bar while in a chapter where it's swapped to desktop mode.
2. Find the label that reads "Desktop Site." It'll probably be the 3rd item, after bookmark & find page (depending on your OS). If not present, press the label that reads "More" and scroll untill you find it.
3. Press the button to the right that reads "On" to turn it off. If it reads "Off", try switching it on and off again to reset it.
4. Try clicking on a link (like a manga page) to see if it's fixed across the site or just on that one page. If it's not fixed on it, repeat the process.
If this does not work (e.g., desktop site button is missing or already), try:
1. Press the 3 dots again.
2. Press "Settings".
3. Scroll down until you find "Site Settings" and press it. Should be grouped under "Privacy and Security".
4. Toggle the switch for "Always Request Desktop Site" if it uses a switch, or press it and then select "Off" if it doesn't.
5. Refresh page if needed.
If that also doesn't work, Firefox is treating your device as a larger screened one, so it's defaulting to desktop mode. You'd have to alter your system settings to decrease your font or display size, so I'd recommend trying another browser. Since mangago has no ads if you're logged in, any browser should be fine since you don't need adblock.
I hope this helps, please lmk if it doesn't and I'll look into it :)

My homepage is fine but whenever I enter a chapter it turns into the desktop version. I clicked on my profile and click on mobile version already but that doesn't work. Please help me☹