Both { -brand-name-firefox } and { -brand-name-opera } are compatible across every platform including { -brand-name-windows }, { -brand-name-mac }, { -brand-name-linux }, { -brand-name-android } and { -brand-name-ios }. { -brand-name-firefox } account holders can easily sync their bookmarks, passwords, open tabs, and browsing history across all their signed into devices. The same is true for { -brand-name-opera } users with an account. However, many sites, especially old sites that haven’t been updated in years, block the latest version of { -brand-name-opera } entirely. So if visiting places like your Ex’s old blog is important, take heed, you may not be able to access some of the dustier corners of the internet if you use { -brand-name-opera }.
Mae { -brand-name-firefox } ac { -brand-name-opera } yn gydnaws ar draws pob platfform gan gynnwys { -brand-name-windows }, { -brand-name-mac }, { -brand-name-linux }, { -brand-name-android } ac { -brand-name-ios }. Gall deiliaid cyfrifon { -brand-name-firefox } gydweddu eu nodau tudalen, eu cyfrineiriau, eu tabiau agored, a'u hanes pori ar draws eu holl ddyfeisiau sydd wedi'u  mewngofnodi. Mae'r un peth yn wir am ddefnyddwyr { -brand-name-opera } sydd â chyfrif. Fodd bynnag, mae llawer o wefannau, yn enwedig hen wefannau na chawsant eu diweddaru ers blynyddoedd, yn rhwystro fersiwn ddiweddaraf { -brand-name-opera } yn llwyr. Felly os yw ymweld â lleoedd fel hen flogiau'n bwysig, gwyliwch, efallai na fyddwch yn gallu gael mynediad at rhai o gorneli llychlyd y rhyngrwyd os ydych chi'n defnyddio { -brand-name-opera }.